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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7950157 | Router plane A router plane having a collar maintained in snug engagement with a blade shank during blade height adjustment to facilitate accurate adjustment with a threaded adjustment nut that travels on an adjustment post. The collar is retained on a post secured to the router... | 05/31/2011 |
| 7228631 | Contouring shave The invention is directed to a hand tool for cutting shavings from the surface of a workpiece of wood (or other workable material) to shape and make smooth any three-dimensional surface having concave, flat, and/or convex contours. The thickness of the shavings is m... | 06/12/2007 |
| 6905290 | Hand rasp with groove blade and adjustable guide for scoring construction material An improved hand rasp comprises a planar plate with an anterior surface and an opposing posterior surface. An ergonomic handle is affixed to the anterior surface of the plate. A groove blade is removably affixed to the posterior surface of the plate by attachment me... | 06/14/2005 |
| 6751876 | Manual belt skiver A manual skiver for conveyor belts and the like includes a base with a flat bearing surface for engaging an associated belt face, and a blade receiving opening through the bearing surface. A handle is connected with the base to facilitate drawing the skiver across t... | 06/22/2004 |
| 5771587 | Manual belt skiver A manual belt skiver removes a top layer of material along an end edge of a elt in preparation for mounting a lacing thereon. The skiver has a base with a handle attached thereto, and a normally vertical contact surface adapted to slide along the end edge ... | 06/30/1998 |
