Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 4256117 | Cardiac monitor with stop watch means A digital stop watch is provided in combination with a cardiac monitor wherein both the stop watch means and the cardiac monitor utilize a common display means and wherein the combination is adapted to be worn around the wrist. The stop watch is of conven... | 03/17/1981 |
| 4096854 | Cardiac monitor with rate limit means A cardiac monitor comprises a transducer worn on the body and adapted to produce an electrical pulse in response to each heart beat of the wearer. The transducer output is fed into a rate logic circuit which generates a heart beat rate signal representati... | 06/27/1978 |
