Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 4929886 | Apparatus for detecting noise in the measurement of very small resistance A pair of a first and a second R-C integrating circuits connected in series. A first switch S1 supplies a first combined voltage E1 +E3 of a first positive threshold voltage E1 and a positive initial set up volt... | 05/29/1990 |
| 4812755 | Base board for testing integrated circuits A plug board for testing integrated circuits includes a plurality of sockets for receiving the terminals of an integrated circuit to be tested, a plurality of contacting terminals arranged in an annular layout and electrically connected to the sockets, an... | 03/14/1989 |
| 4677375 | Apparatus for testing integrated circuit An apparatus for testing plug-in type integrated circuits by applying a potential across their input and output terminals, utilizing a socket board with a plurality of sockets bored therein to receive respective input and output terminals of an integrated... | 06/30/1987 |
| 4449091 | Power controlling circuit for automatic regulating apparatus A power controlling circuit for automatic temperature regulator or the like using a zero voltage switching control. Clocks are dispersed and selected, in accordance with control factor, from among the clocks synchronized with the load power supply when ze... | 05/15/1984 |
