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 |
| 4274082 | Transmission system for the digital control of devices Transmission system for digital control of electrical devices, by means of standardized or uniformly releasable pulse combinations corresponding to the desired control operations, which pulse combinations are sent selectively at least from a first and a s... | 06/16/1981 |
| 4250527 | Switching device for cassette tape recorders A switching device for a cassette tape recorder with which the magnetic head, by means of a feed device which is actuatable by a solenoid, is introducable into an opening of the cassette and is again removeable by means of a spring, whereby in the circuit... | 02/10/1981 |
| 4247976 | Method for production of a turntable with stroboscope marks A method for production of a turntable which carries stroboscope marks with a metallic surface on the face side of its rim, the metallic surface relative to its dark colored intermediate spaces being elevated. In the edge vicinity of a disc which is made ... | 02/03/1981 |
| 4198058 | Pick-up with exchangeable stylus A pick-up with a carrier element, on which a capsule which contains the electro-mechanical transducer is exchangeably fastened, in which capsule a needle carrier is held pushed-in up to an abutment, and an arm for handling the pick-up is pivotally mounted... | 04/15/1980 |
| 4177490 | Switching device for cassette tape recorders A cassette tape recorder for use with a cassette which has at least one opening on its wide side, through which opening, upon the insertion of the cassette into the device, there can be inserted at least one winding mandrel for engagement in the core of t... | 12/04/1979 |
| 4153919 | Protective hood for cassette tape recorders A protective arrangement for a cassette tape recorder in which a magnetic head has a face side facing upwards, and is located within the recorder. A protective hood covers the face side of the magnetic head, and is rotatably located about a horizontal axi... | 05/08/1979 |
| 4142217 | Switching device for a tape recorder A tape recorder with a motor-containing-drive device for normal forward running (record or playback) and for fast rewinding of the recording tape, and a carrier plate on which the magnetic heads are arranged. The carrier plate is displaceable in its plane... | 02/27/1979 |
| 4133498 | Drive device for a tape recorder A drive device for a tape recorder by which the recording tape is drawn off one spool by means of a capstan, and is wound-up on another spool, which is driven over a friction coupling by a motor with a speed not substantially above the highest required wi... | 01/09/1979 |
