Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4809644 | Rotatable bridle storage device for horse trailers The present invention relates to an improved method of storing bridles for transit in horse transport trailers, which are designed and constructed for the transport of horses. Such transport destinations are to shows rodeos, races or hunts and other event... | 03/07/1989 |