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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7156598 | Waffle stud for insert molded plastic members A fastener is configured for use in the manufacture of molded plastic components that will be subsequently attached to other components by the fastener. The low profile head portion of the fastener has a rounded contoured and convoluted top surface to facilitate the... | 01/02/2007 |
| 7107874 | Hammer having a detachable bell A hammer having a coupling rod extended from a neck at one end of the hammer body of the hammer, a bell detachably attached to the coupling rod, a rubber socket mounted in a transverse through hole of the bell and a transverse through hole of the coupling rod to acc... | 09/19/2006 |
| 7096761 | Ergonomic tool handle and related hammer system An ergonomic handle for a hand tool includes a main portion extending in a longitudinal direction between a gripping portion and a tool head supporting portion opposite the gripping portion. Both the gripping portion and the tool head supporting portion are offset a... | 08/29/2006 |
| 6363817 | Shock absorption system for a striking tool A system for absorbing shock including a resilient member positioned between a portion of the head and a portion of the shaft of the tool. The resilient member dampens and absorbs vibration travelling from the head to the shaft and reverberations travelli... | 04/02/2002 |
| 5951418 | Polo mallet and method of repair An improved polo mallet includes a single-cane upper shaft portion spliced to a twin-cane lower shaft portion which is securely joined to a mallet head. The upper shaft portion maintains the flexibility required for effective game play while the lower sha... | 09/14/1999 |
| 5375487 | Maul head partially filled with shot A maul assembly including a maul head having an annular body with an annular outer wall concentric to an annular inner wall and an annular chamber within the body disposed between the two walls. The annular walls and chamber are circumferentially disposed... | 12/27/1994 |
| 4633741 | Hammering tool with flexible handle A hammer has a pair of substantially-parallel relatively-thin plate springs secured between the striking head of the hammer and its gripping handle. The respective plate springs are provided with longitudinal ribs (preferably outwardly curved in cross-sec... | 01/06/1987 |
| 4548248 | Handle for striking tool A handle for a striking tool includes a hand-fitting elongate body adapted for supporting an impact head at one end. The handle body is provided with transverse finger receiving recesses, complementary grooves within opposed side faces and a longitudinal ... | 10/22/1985 |
| 4541322 | Musical instrument mallet and method of making the same A musical instrument mallet includes an improved arrangement by which the mallet playing head is attached to the mallet shaft. The mallet includes a shaft having handle and head portions, an apertured playing head, and a sleeve with flanges at opposite en... | 09/17/1985 |
| 4373565 | Mallet To provide for effective force transfer upon striking of blows between plastic end portions covering a metal, typically steel, core without damage to the plastic striking end portions (201, 202), the plastic end portions (201, 202) form part of a single u... | 02/15/1983 |
| 3948301 | Bammer A novel innovation which expands the uses of a basic tool (hammer) is the major function of the present invention's design, as disclosed. Specifically the Bammer, which utilizes a principle of inertia to concentrate and compound the initial striking force, all... | 04/06/1976 |
| 3942567 | Cast aluminum alloy hammer A hammer cast in a sand mold of one piece including a head and a handle. The material of which it is cast is a magnesium aluminum alloy. Both the handle and head have axes which are normal to each other and a rod is mounted in the handle extending the len... | 03/09/1976 |
| 3930525 | Soft nose hammer and manufacture thereof A soft head hammer made by splaying or radially spreading an end of a length of water pipe previously given a plurality of diametrically opposed endwise cuts, and thereafter molding the head of the hammer constituted of a relatively soft and lower melting... | 01/06/1976 |
