Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Application No. | Application Title | Issue Date |
| 20080271470 | Memory Wire Rotary Actuator A timer is provided. The timer includes a rotatable electrically non-conducting ratchet gear, an electrically conducting pawl mechanism, and an electronic drive circuit. The ratchet gear has a plurality of teeth. The electrically conducting pawl mechanism includes a paw... | 11/06/2008 |