Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7362239 | Vehicle warning system A vehicle warning system is responsive to vehicle speed and position as determined by GPS or other location based system information to alert a vehicle operator of potentially unsafe conditions when either exceeding the speed limit on a given road segment or when ap... | 04/22/2008 |