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|
American Slide Rule Patents
Table of Contents
|
The patent list is grouped by decades. The list
was compiled by Osborne Price.
|
Patents 1851 - 1900
Patent |
Issue Date |
Title |
Inventor |
| 7,961 |
Mar 4, 1851 |
Calculating Machine |
John W. Nystrom |
| 199,289 |
Jan 15, 1878 |
Calculator (circular slide rule) |
Walter Hart
|
| 219,246 |
Sep 2, 1879 |
Calculator (cylindrical slide rule) |
George Fuller
|
| 219,246 |
Sept 2, 1879 |
Calculator (cylindrical slide rule) |
George Fuller |
| 249,117 |
Nov 1, 1881 |
Slide Rule |
Edwin Thacher |
| 387,070 |
Jul 31, 1888 |
Logarithmic Sliding Scale |
Walter Hart |
| 426,444 |
Apr 29, 1890 |
Sliding Calculating Scale |
Walter Hart |
| 460,930 |
Oct 6, 1891 |
Engineer's Slide Rule |
William Cox |
| 492,677 |
Feb 28, 1893 |
Crytographic Instrument |
Richard Harte |
| 513,172 |
Jan 23, 1894 |
Logarithmic Calculator (cylindical) |
Julius Billeter |
| 520,114 |
May 22, 1894 |
Slide Rule |
T.H. Johnson |
| 543,612 |
July 30, 1895 |
Slide Rule |
Branch H. Colby |
| 603,370 |
May 3, 1898 |
Slide Rule |
J.E.G. Yalden |
| 603,695 |
May 10, 1898 |
Slide Rule |
W.L.E. Keuffel |
| 606,388 |
June 28, 1898 |
Slide Rule |
John G.D. Mack |
| 621,348 |
Mar 21, 1899 |
Slide Rule |
W.L.E. Keuffel |
| 651,142 |
Jun 5, 1900 |
Slide Rule |
W.L.E. Keuffel |
| 657,916 |
Sept 18, 1900 |
Calculating Instrument |
Roger W. Conant |
Patents 1901 - 1910
Patent |
Issue Date |
Title |
Inventor |
|
677,817
|
July 2, 1901
|
Slide Rule
|
Edwin Thacher
|
|
694,258
|
Feb. 25, 1902
|
Slide Rule
|
J.H.C. Dennert
|
|
701,103
|
May 27, 1902
|
Slide Rule
|
Edwin Thacher
|
|
753,840
|
March 8, 1904
|
Slide Rule
|
Barth, Gant and Taylor
|
|
767,170
|
Aug 9, 1904
|
Engineer's Slide Rule
|
Leon Rosenthal
|
|
768,971
|
Aug 30, 1904
|
Slide Rule
|
F.J. Anderson
|
|
773,235
|
Oct 25, 1904
|
Logartihmic Calculator
|
Elmer A. Sperry
|
|
788,638
|
May 2, 1905
|
Wine and Spirit Calculating Rule
|
F.C. Farmar
|
|
838,696
|
Dec 18, 1906
|
Slide Rule
|
W.F. Doherty
|
|
843,944
|
Feb 12, 1907
|
Calculating Device
|
Robert L. Hibbard
|
|
845,463
|
Feb 26, 1907
|
Slide Rule (circular)
|
Harold T. Hincks
|
|
879,237
|
Feb 18, 1908
|
Slide Rule
|
Baumbach and Klitsche
|
|
880,907
|
March 3, 1908
|
Slide Rule
|
Franz Nickel
|
|
887,390
|
May 12, 1908
|
Slide Rule
|
J.L. Hall
|
|
907,373
|
Dec 22, 1908
|
Slide Rule
|
W.L.E. Keuffel
|
|
909,621
|
Jan 12, 1909
|
Calculating Device
|
Sidney R. Lamb
|
|
922,465
|
May 25, 1909
|
Calculating Device
|
Robert H. Fenn
|
|
937,863
|
Oct. 26, 1909
|
Flexible Slide Rule
|
Robert J. Roberts
|
|
962,441
|
June 28, 1910
|
Calculator
|
Harry L. Lerner
|
|
974,354
|
Nov. 1, 1910
|
Radiation Calculator
|
Paul F. Brown
|
Patents 1911 - 1920
Patent |
Issue Date |
Title |
Inventor |
|
980,412
|
Jan. 3, 1911
|
Slide Rule
|
G.H. Gibson
|
|
982,876
|
Jan. 31, 1911
|
Slide Rule
|
George Richardson
|
|
996,039
|
June 20, 1911
|
Magnifier for Slide Rule
|
W.L.E. Keuffel
|
|
1,000,562
|
Aug. 15, 1911
|
Slide Rule
|
B.T. Steber
|
|
1,012,660
|
Dec. 26, 1911
|
Calculating Device (watch type)
|
George Lange (of Hoboken)
assigned to Keuffel & Esser
|
|
1,017,719
|
Feb. 20, 1912
|
Circular Slide Rule
|
Herbert R. Watts
|
|
1,021,484
|
Mar. 26, 1912
|
Slide Rule
|
George Richardson
|
|
1,028,237
|
June 4, 1912
|
Slide Rule
|
A.N. Lurie
|
|
1,041,204
|
Oct. 15, 1912
|
Elapse Time Computer and
Century Calendar Machine
|
Allen Van Resselaer and
Fred Tenney
|
|
1,042,755
|
Oct. 29, 1912
|
Calculator (circular)
|
Franklin S. Beckett
|
|
1,050,129
|
Jan. 14, 1913
|
Slide Rule
|
R.M Hamby
|
|
1,056,775
|
Mar. 25, 1913
|
Circular Slide Rule
|
David W. Brunton
|
|
1,062,321
|
May 20, 1913
|
Slide Rule
|
J. W. Buzzell
|
|
1,075,124
|
Oct. 7, 1913
|
Slide Disk Calculator
|
John A. Scheibli
|
|
1,088,175
|
Feb. 24, 1914
|
Slide Rule
|
W.O. Phillips
|
|
1,108,480
|
Aug. 25, 1914
|
Slide Rule
|
H.W. Tomlinson
|
|
1,110,855
|
Sept. 15, 1914
|
Slide Rule
|
C.D. Alan
|
| 1,123,507 |
Jan. 5, 1915 |
Slide Rule |
F.C. Farmar |
| 1,145,042 |
July 6, 1915 |
Calculating Device (fluid flow in pipes) |
Jacob M. Spitzglass |
|
1,150,771
|
Aug. 17, 1915
|
Slide Rule Runner
|
W.L.E. Keuffel
|
|
1,154,619
|
Sept. 28, 1915
|
Slide Rule
|
C.F.Dieckman
|
|
1,157,526
|
Oct. 19, 1915
|
Slide Rule
|
C.A. Gilson
|
|
1,170,886
|
Feb. 8, 1916
|
Wage Computer
|
Jean C. Flamand
|
|
1,181,672
|
May 2, 1916
|
Slide Rule Runner
|
W.L.E. Keuffel
|
|
1,210,488
|
Jan 2, 1917
|
Slide Rule
|
Kelly and Hornyak
|
| 1,250,379 |
Dec 18, 1917 |
Slide Rule |
Stillman and Schleicher |
| 1,260,454 |
March 26, 1918 |
Slide Rule |
George W. Richardson |
| 1,279,798 |
Sept. 24, 1918 |
Slide Rule |
W.A. Warman
|
|
1,291,742
|
Jan 12, 1919
|
Slide Rule
|
W.J. Bousquet
|
|
1,329,902
|
Feb 3, 1920
|
Slide Rule
|
J. Hemmi
|
|
1,338,588
|
April 27, 1920
|
Calculating Device (circular)
|
Ford L. Prescott
|
|
1,343,549
|
June 15, 1920
|
Slide Rule
|
C.J. Davidson
|
Patents 1921 - 1930
Patent |
Issue Date |
Title |
Inventor |
|
1,364,154
|
Jan 4, 1920
|
Slide Rule
|
Stillman and Schleichter
|
|
1,378,993
|
May 24, 1921
|
Slide Rule
|
E. Bohnke
|
|
1,382,011
|
June 21, 1921
|
Slide Rule
|
O'Neil and Payne
|
|
1,387,267
|
Aug 9, 1921
|
Slide Rule Magnifier
|
C. Holle
|
|
1,398,914
|
Nov. 29, 1921
|
Slide Rule
|
R.A. Pierce
|
|
1,404,019
|
Jan 17, 1922
|
Mechanical Calculating Device
|
Clair A. Gilson
|
|
1,404,951
|
Jan 31, 1922
|
Slide Rule
|
E.T. Frankel
|
|
1,405,333
|
Jan. 31, 1922
|
Slide Rule
|
Herman Ritow
|
|
1,411,541
|
April 4, 1922
|
Slide Rule
|
M. Tang
|
|
1,431,409
|
Oct 10, 1922
|
Slide Rule
|
W.L. Miller
|
|
1,437,298
|
Nov. 28, 1922
|
Belt Calculator
|
Gustav R. Fickert
|
|
1,455,339
|
May 15, 1923
|
Slide Rule
|
Keller and Badge
|
|
1,459,857
|
June 26, 1923
|
Slide Rule
|
Olin D. Parsons
|
|
1,461,677
|
July 10, 1923
|
Slide Rule
|
C.N. Reynolds
|
|
1,461,975
|
July 17, 1923
|
Slide Rule
|
Eaton and Lamay
|
|
1,484,176
|
Feb 19, 1924
|
Computing Device
|
Willaim S. Haines
|
|
1,487,805
|
Mar 25, 1924
|
Device for Making Vector Calculations
|
A.F. Puchstein
|
|
1,488,686
|
Apr 1, 1924
|
Log Log Duplex Slide Rule
|
Adolf W. Keuffel
|
|
1,525,752
|
Feb 10, 1925
|
Slide Rule
|
C.S. Larkey
|
|
1,532,014
|
Mar 31, 1925
|
Slide Rule
|
F. Womper
|
|
1,553,969
|
Sept 15, 1925
|
Slide Rule
|
J.S. Wollk
|
|
1,554,176
|
Sept. 15, 1925
|
Slide Rule
|
K. Becker
|
|
1,560,599
|
Nov. 10, 1925
|
Slide Rule
|
C.C. Moler
|
|
1,568,475
|
Jan 15, 1926
|
Vector Calculator
|
M.P. Weinbach
|
|
1,581,567
|
Apr 20, 1926
|
Slide Rule
|
J.E. Eshbaugh
|
|
1,596,129
|
Aug 17, 1926
|
Slide Rule
|
R. Uhlich
|
|
1,597,483
|
Aug 24,1926
|
Slide Rule
|
Herman Ritow
|
|
1,602,479
|
Oct 12, 1926
|
Slide Rule
|
Balmer, Hardenbergh and Fisk
|
|
1,605,355
|
Nov 2, 1926
|
Slide Rule
|
S. Lee
|
|
1,605,922
|
Nov 9, 1926
|
Slide Rule
|
G.M. Cook
|
|
1,609,972
|
Dec 7, 1926
|
Slide Rule
|
Scherrer and Hess
|
|
1,632,505
|
June 14, 1927
|
Slide Rule
|
Herman Ritow
|
|
1,655,819
|
Jan 10, 1928
|
Calculating Device
|
C.R. Nichols
|
|
1,659,246
|
Feb 14, 1928
|
Calculating Device
|
R.S. Drew and C.L. Cruver
|
|
1,661,095
|
Feb 28, 1928
|
Calculating Device
|
J.E. Rowe
|
|
1,667,449
|
Apr 24, 1928
|
Magnifying Device for Slide Rules
|
F. Womper
|
|
1,674,157
|
June 19, 1928
|
Calculating Device
|
C.F. Christopher
|
|
1,678,019
|
July 24, 1928
|
Calculating Device
|
N.L. Oates
|
|
1,691,104
|
Nov 13, 1928
|
Calculating Device
|
J.G. Zollman
|
Patents 1931 - 1940
Patent |
Issue Date |
Title |
Inventor |
|
1,790,569
|
Jan 27, 1931
|
Slide Rule
|
J. Asper
|
|
1,834,745
|
Dec. 1, 1931
|
Slide Rule
|
N. Shifner
|
|
1,849,058
|
Mar 15, 1932
|
Circular Slide Rule
|
J.A. Dempster
|
|
1,855,523
|
Apr 26, 1932
|
Slide Rule Indicator
|
A. Langsner
|
|
1,870,655
|
Aug 9, 1932
|
Computation Rule
|
M.O. Schur
|
|
1,875,927
|
Sept 6, 1932
|
Slide Rule
|
Adolf W. Keuffel
|
|
1,892,012
|
Dec 27, 1932
|
Flexible Slide Rule
|
Hans Seehase
|
|
1,894,294
|
Jan 17, 1933
|
Slide Rule
|
A. Langsner
|
|
1,904,474
|
Apr 18, 1933
|
Slide Rule
|
A.W. Keuffel
|
|
1,930,852
|
Oct 17, 1933
|
Slide Rule
|
A.W. Keuffel
|
|
1,934,232
|
Nov 7, 1933
|
SlideRule
|
A.W. Keuffel
|
|
1,942,349
|
Jan 2, 1934
|
Slide Rule
|
F. Wompner
|
|
1,947,699
|
Feb 20, 1934
|
Slide Rule
|
B.G. Dwyre
|
|
1,952,134
|
Mar 27, 1934
|
Slide Rule
|
A. Langsner
|
|
1,961,295
|
June 5, 1934
|
Calculating Device
|
Melville P. Hite
|
|
1,978,038
|
Oct. 23, 1934
|
Slide Rule
|
J.A. Boll
|
|
1,983,062
|
Dec 4, 1934
|
Medical Arts Sterility Slide Rule
|
Cyrus W. Anderson
|
|
1,987,536
|
Jan 8, 1935
|
Slide Rule
|
C. Norris
|
|
2,000,337
|
May 7, 1935
|
Slide Rule Case
|
A.W. Keuffel
|
|
2,061,853
|
Nov. 24, 1936
|
Slide Rule
|
G.D. Schaeffer
|
|
2,071,195
|
Feb 16, 1937
|
Slide Rule
|
E.L. Bowles
|
|
2,079,464
|
May 4, 1937
|
Hyperbolic Slide Rule
|
Hisashi Okura
|
|
2,086,502
|
July 6, 1937
|
Runner for Slide Rule
|
A.W. Keuffel
|
|
2,087,446
|
July 20, 1937
|
Slide Rule
|
F.E. Proal
|
|
2,091,039
|
Aug 24, 1937
|
Slide Rule
|
R.D. Groch
|
|
2,117,155
|
May 10, 1938
|
Calculating Device
|
Cornelius Jan Dussel
|
|
2,117,413
|
May 17, 1938
|
Decimal Point Indicating Mechanism
for Slide Rule Computation
|
Howard Gilmore
|
|
2,120,878
|
Jun 14, 1938
|
Slide Rule
|
J.G. Valenzuela
|
|
2,136,169
|
Nov 8, 1938
|
Slide Rule Indicator
|
A.W. Keuffel
|
|
2,137,630
|
Nov 22, 1938
|
Slide Rule
|
N. Sinitzin-White
|
|
2,138,879
|
Dec 6, 1938
|
Slide Rule
|
R.B. Poole
|
|
2,143,559
|
Jan 10, 1939
|
Slide Rule
|
A.W. Keuffel
|
|
2,153,089
|
Apr 4, 1939
|
Add/Subtract Device for Slide Rules
|
Carl Kubler
|
|
2,156,568
|
May 2, 1939
|
Computing Device
|
John W. Lee
|
|
2,158,476
|
May 16, 1939
|
Slide Rule
|
G.H. Morse
|
|
2,161,345
|
Jun 6, 1939
|
Rhythmic Cycle Calendar
|
Velma A. Gates
|
|
2,168,056
|
Aug 1, 1939
|
Slide Rule
|
Carl Bernegan
|
|
2,170,144
|
Aug 22, 1939
|
Slide Rule
|
Lyman, Kells et.al.
|
|
2,173,459
|
Sept. 19, 1939
|
Slide Rule
|
P.M. Van Doorman
|
|
2,190,281
|
Feb 13, 1940
|
Slide Rule
|
C.P. Berg
|
|
2,221,476
|
Nov. 12, 1940
|
Sldie Rule
|
H.C. Goodrich
|
Patents 1941 - 1950
Patent |
Issue Date |
Title |
Inventor |
|
2,235,106
|
Mar 18, 1941
|
Slide Rule
|
E. Hirand
|
|
2,264,406
|
Dec 2, 1941
|
Reset Slide Rule
|
E.A. Ravenscroft
|
|
2,265,372
|
Dec 9, 1941
|
Slide Rule
|
Johnson and Goyan
|
|
2,275,219
|
Mar 3, 1942
|
Circular Slide Rule
|
W. Daeman
|
|
2,283,473
|
May 19, 1942
|
Slide Rule
|
John Tyler, et. al.
|
|
2,285,722
|
Jun 9, 1942
|
Slide Rule
|
Lyman, Kells, et.al.
|
|
2,289,717
|
Jul 14, 1942
|
Slide Rule for the Sightless
|
R. Montgomery
|
|
2,301,033
|
Nov 3, 1942
|
Calculating Device (Circular)
|
Alexander C. Findlay
|
|
2,334,725
|
Nov 23, 1943
|
Calculating Instrument
|
Albert M. Perkins
|
|
2,335,792
|
Nov 30, 1943
|
Slide Rule
|
M.A. Roggenkamp
|
|
2,341,681
|
Feb 15, 1944
|
Slide Rule
|
M.C. Anderson
|
|
2,358,309
|
Sep 19, 1944
|
Slide Rule
|
O.E. Batori
|
|
2,358,478
|
Sep 19, 1944
|
Rotary Slide Rule
|
B. Sassen
|
|
2,358,479
|
Sep 19, 1944
|
Roatry Slide Rule
|
B. Sassen
|
|
2,369,819
|
Feb 20, 1945
|
Slide Rule
|
Joseph Dietzgen
|
|
2,385,948
|
Oct. 2, 1945
|
Slide Rule
|
T.J. Setera
|
|
2,403,382
|
Jul 2, 1946
|
Slide Rule
|
S. Lerner
|
|
2,405,720
|
Aug 13, 1946
|
Slide Rule
|
A.L. Snedaker
|
|
2,407,338
|
Sep 10, 1946
|
Slide Rule Indicator
|
A.H. Kreiling
|
|
2,415,231
|
Feb 14, 1947
|
Slide Rule
|
O.E. Batori
|
|
2,418,910
|
Apr 15, 1947
|
Slide Rule
|
J.J. Smidl
|
|
2,422,421
|
Jun 17, 1947
|
Slide Rule
|
H.M. Kaufman
|
|
2,422,649
|
Jun 17, 1947
|
Slide Rule
|
James R. Bland
|
|
2,429,212
|
Oct 21, 1947
|
Slide Rule
|
O.E. Batori
|
|
2,430,599
|
Nov 11, 1947
|
Slide Rule
|
O.E. Batori
|
|
2,434,306
|
Jan 13, 1948
|
Statistical Slide Rule
|
K.R. Wood
|
|
2,435,705
|
Feb 10, 1948
|
Disc Slide Rule
|
G.F. Wittgenstein
|
|
2,437,722
|
Mar 16, 1948
|
Slide Rule
|
O.E. Battori
|
|
2,439,025
|
Apr 6, 1948
|
Slide Rule
|
G.W. Sammons
|
|
2,439,413
|
Apr 13, 1948
|
Cryptographic Slide Rule
|
Robert M. Mitchell
|
|
2,445,464
|
Jul 20, 1948
|
Slide Rule
|
J.F. Ailinger
|
|
2,449,954
|
Sep 21, 1948
|
Slide Rule
|
I.S. Roberts
|
|
2,454,157
|
Nov 16, 1948
|
Slide Rule for Sewer Design
|
I. Goldfien
|
|
2,456,676
|
Dec 21, 1948
|
Slide Rule Indicator
|
W.C. Chowns
|
|
2,460,558
|
Feb 1, 1949
|
Slide Rule
|
O.A. Wiberg
|
|
2,463,067
|
Mar 1, 1949
|
Slide Rule Indicator
|
W.O. Teasdale
|
|
2,466,983
|
Apr 12, 1949
|
Slide Rule
|
A.F. Eckel
|
|
2,473,876
|
Jun 21, 1949
|
Slide Rule
|
H.H. Goldstaub
|
|
2,478,547
|
Aug 9, 1949
|
Slide Rule Runner
|
E. Pignone
|
|
2,486,748
|
Nov 1, 1949
|
Slide Rule
|
F.L. Koenig
|
|
2,489,790
|
Nov 29, 1949
|
Slide Rule
|
H.S. Lieberman
|
|
2,494,291
|
Jan 10, 1950
|
Rhythmic Cycle Indicator
|
James P. Fay
|
|
2,500,460
|
Mar 14, 1950
|
Slide Rule
|
Herschel Hunt
|
|
2,506,176
|
May 2, 1950
|
Slide Rule
|
P. Sbernadori
|
|
2,511,270
|
Jun 13, 1950
|
Slide Rule
|
B.D. Kahan
|
|
2,512,458
|
Jun 20, 1950
|
Slide Rule
|
Y. Fujisaki
|
|
2,520,208
|
Aug 29, 1950
|
Sterility and Fertility Slide Rule
|
Abraham Green
|
|
2,527,776
|
Oct 31, 1950
|
Slide Rule
|
J.L. Taafe
|
|
2,530,047
|
Nov 14, 1950
|
Slide Rule
|
N.F. Dewar
|
|
2,534,695
|
Dec 19, 1950
|
Slide Rule
|
James R. Bland
|
Patents 1951 - 1960
Patent |
Issue Date |
Title |
Inventor |
|
2,543,313
|
Feb 27, 1951
|
Clip (to attach case to belt)
|
Joseph E. Dietzgen
|
|
2,564,616
|
Aug 14, 1951
|
Slide Rule
|
J. Telasco
|
|
2,569,202
|
Sep 25, 1951
|
Slide Rule
|
C. Solomon
|
|
2,569,454
|
Oct 2, 1951
|
Slide Rule
|
D.L. Cole
|
|
2,572,811
|
Oct 23, 1951
|
Calculating Machine
|
Pierre J.L. Julien
|
|
2,575,288
|
Nov 13, 1951
|
Slide Rule
|
J.N. Nielsen
|
|
2,594,857
|
Apr 29, 1952
|
Slide Rule
|
W.J. Boos
|
|
2,595,299
|
May 6, 1952
|
Disc Slide Rule
|
E.S. Russell
|
|
2,597,523
|
May 20, 1952
|
Slide Rule
|
M.J. Quillinan
|
|
2,602,574
|
Jul 8, 1952
|
Slide Rule Belt Carrier
|
G. Mangold and F. Zener
|
|
2,628,025
|
Feb 10, 1953
|
Slide Rule
|
M.J. Quillinan
|
|
2,634,912
|
Apr 14, 1953
|
Slide Rule Indicator
|
C.P. Davey
|
|
2,643,057
|
Jun 23, 1953
|
Slide Rule
|
M.J. Quillinan
|
|
2,643,058
|
Jun 23, 1953
|
Slide Rule
|
M.J. Quillinan
|
|
2,643,823
|
Jun 30, 1953
|
Slide Rule
|
M.J. Quillinan
|
|
2,649,247
|
Aug 18, 1953
|
Slide Rule
|
George R. Stibit
|
|
2,650,762
|
Sep 1, 1953
|
Slide Rule
|
P.J. Tolen
|
|
2,658,671
|
Nov 10, 1953
|
Disc Slide Rule with Decimal Indicator
|
J.M.A. Allaid
|
Patents 1961 - 1964
Patent |
Issue Date |
Title |
Inventor |
|
3,120,342
|
Feb 4, 1964
|
Slide Rule (Electronics)
|
Darrel L. Geiger
|
|
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