Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4064563 | Billiard glove A three-fingered panelled smoothly fitted glove provides for uninhibited contact of the skin of the ring and little fingers with a billiard or like table while providing seam-free contact of the index and middle fingers and thumb with the billiard or like... | 12/27/1977 |
| 4051553 | Hand protector For football, a hard foam rubber pad is affixed to the back of a lightweight cotton glove. The pad extends over the knuckles, (metacarpo-phalangeal joint), of a hand inserted in the glove. The pad is molded so as to force the fingers to naturally curl wit... | 10/04/1977 |
| 4047250 | Contoured wrist support This invention provides a contoured wrist support that includes a sheet portion adapted to be wrapped around the wrist, the sheet portion being made up of more than one element having contoured edges stitched together so as to provide it with a three-dime... | 09/13/1977 |
| 4042975 | Means for protecting batters from hand injuries A pair of protective plates are releasably secured to the back side of a glove. One plate covers the back of the hand and the other plate covers the lower portions of the fingers. The two plates are spaced apart to allow freedom of movement of the knuckle... | 08/23/1977 |
| 3997922 | Glove A glove for cross-country skiing. The glove flexes as the skier clenches his fist to grasp his ski pole. The glove is neither stretched nor is the hand of the skier within the glove subjected to tension. The invention accomplishes this result by cuts exte... | 12/21/1976 |