Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 5937688 | Adjustable side guide with quick change strip heater assembly A hot metallic workpiece is advanced between side guides extending along opposite lateral sides of a driven roller table for guiding the hot metallic workpiece to a hot mill. Each of the side guides takes the form of a beam section including an elongated ... | 08/17/1999 |