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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.

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Number of patents: 1
Last date: February 11, 1986

Number	Title	Issue Date
4570227	Portable map display apparatus A portable map display apparatus stores, in a memory, features of a plurality of points on a given map and features of routes connecting such points and, on receiving input signals concerning a given point of start and a given destination, sequentially di...	02/11/1986