Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 3978899 | Closure for a steel band or strap placed around one or more articles and method and device for making said closure A closure band and a method for interconnecting the overlapping ends of the band and an apparatus for making the connection in which incisions are formed laterally into the opposite edges of the superimposed band ends to form tabs along the band edges. Th... | 09/07/1976 |
| 3934918 | Junction for sheet-like material load lifting band with overload indicator A load lifting band with an overload indicator includes a junction for strip material which is particularly useful for joining the ends of a strip of material so as to form a closed band for lifting heavy loads. The junction consists of a pair of overlapp... | 01/27/1976 |