Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4242772 | Traverse rod drapery hook A traverse rod drapery hook is attachable to the terminal end of a curtain or drape and includes a member into which the terminal end of the traverse rod telescopes. The hook hereof includes a plate which provides a rigid surface for maintaining the drape... | 01/06/1981 |