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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 5823435 | Rotating nozzle A rotating spray nozzle for use in cleaning containers having a spray head on a shaft, an element for passing liquid both to the exterior of the spray head to cause rotation thereof and for the delivery of liquid in annular streams, liquid passing to the ... | 10/20/1998 |
