-
-
-
3713047
-
Patent number 3,713,047
-
Issue date Jan 23, 1973
-
H03 - BASIC ELECTRONIC CIRCUITRY
-
3487630
-
Patent number 3,487,630
-
Issue date Jan 6, 1970
-
G04 - HOROLOGY
-
3472020
-
Patent number 3,472,020
-
Issue date Oct 14, 1969
-
G04 - HOROLOGY
-
2981054
-
Patent number 2,981,054
-
Issue date Apr 25, 1961
-
G04 - HOROLOGY
-
1329083
-
Patent number 1,329,083
-
Issue date Jan 27, 1920
-
G04 - HOROLOGY
-
1188877
-
Patent number 1,188,877
-
Issue date Jun 27, 1916
-
G04 - HOROLOGY