-
-
Logic design slide rule
-
Patent number 4,994,656
-
Issue date Feb 19, 1991
-
Wang C. Ng
-
G06 - COMPUTING CALCULATING COUNTING
-
3716187
-
Patent number 3,716,187
-
Issue date Feb 13, 1973
-
G06 - COMPUTING CALCULATING COUNTING
-
2375666
-
Patent number 2,375,666
-
Issue date May 8, 1945
-
G06 - COMPUTING CALCULATING COUNTING
-
2101298
-
Patent number 2,101,298
-
Issue date Dec 7, 1937
-
G06 - COMPUTING CALCULATING COUNTING
-
1892634
-
Patent number 1,892,634
-
Issue date Dec 27, 1932
-
G06 - COMPUTING CALCULATING COUNTING
-
1892367
-
Patent number 1,892,367
-
Issue date Dec 27, 1932
-
G06 - COMPUTING CALCULATING COUNTING