Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7198295 | Retainer arrangement connecting operating unit to a vehicle A retaining arrangement, including a support arm is proposed, by means of which an operating unit is connected with a vehicle. The retaining arrangement includes a safety device which operates such that, as long as a predetermined condition is not fulfilled, the con... | 04/03/2007 |