Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 5749547 | Control of model vehicles on a track A controller for model trains on a train track is provided. The controller causes direct current control signals to be superimposed on alternating current power signals to control effects and features on model vehicles. The model vehicle includes a receiv... | 05/12/1998 |
| 5555815 | Model train horn control system A horn control system for model vehicles on a track includes a sound generation unit mounted on the model vehicle which generates different sounds based on the combination of two inputs, the speed of the vehicle and an operator initiated horn signal. The ... | 09/17/1996 |
| 5441223 | Model train controller using electromagnetic field between track and ground A controller for model trains on a train track is provided. The controller transmits control signals between a rail of the track and earth ground, generating an electromagnetic field which extends for several inches around the track. A receiver in the loc... | 08/15/1995 |
| 5251856 | Model train controller for reversing unit A control circuit which will momentarily apply a pulse of power to the E-Unit solenoid in response to the momentary interruption of power by the transformer or another control signal. The E-Unit rest state is thus with no power applied, eliminating noise ... | 10/12/1993 |
