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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6722167 | Cabinet lock A cabinet lock controlled by a press-button lock is disclosed to include an upright track affixed to the back side of the cabinet, a sliding locking bar vertically movably mounted in the upright track and adapted to hook the drawers in the cabinet, a linkage coupled... | 04/20/2004 |
| 6173594 | Locking apparatus for use in game machine A locking apparatus of a game machine has the following components: a locking bar provided with a plurality of first engaging portions; engaging members having second engaging portions engageable with the first engaging portions; and a locking bar actuati... | 01/16/2001 |
| 6126210 | Method and apparatus for releasing a latch with two simultaneous non-parallel motions A method and apparatus for providing a latch is disclosed that impedes opening the latch by those, regardless of age, who lack the necessary mental acuity. The latch includes a release mechanism that requires two vertical slide members to be displaced in ... | 10/03/2000 |
| 6036245 | Pivotal gate latch A pivotal gate latch (1), including housing (2), in which a pivotal sleeve (8) and gate post embracing plates (9 and 10) are disposed for pivotal movement. A latching flange (11) is arranged within the housing that engages with an upper disposed detent or... | 03/14/2000 |
| 3993378 | Battery housing A housing for an auxiliary storage battery is provided which may be fitted into the wall of a camper. The housing is formed of plastic material, and it is of an integral, impervious construction, so that no fumes from the storage battery can enter the int... | 11/23/1976 |
| 3992052 | Escape door for trailer The side, end or floor of a house trailer is provided with an opening when being constructed or cut thereinto if completed which is closed by an escape door. The latching mechanism is constructed for rapid opening in case an occupant must hurriedly escape... | 11/16/1976 |
