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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 5942973 | Locking system for a security container A locking system for a security container includes a frame in cabinet form, a jamb formed on the frame, a movable locker plate which determines opening and closing of a door by overlapping with the jamb and which is formed on the door, a combination lock ... | 08/24/1999 |
| 4818974 | Robbery in process warning system An electrically actuated warning system is provided for a banking institution including a plurality of teller stations and a plurality of remote bank employee stations at each of which a desk top-type work surface is provided including a name plate assemb... | 04/04/1989 |
| 4785743 | Protected room with an electrical interruptor and its application A protected closed space (L) comprises at least one wall element (E) provided with an electrical interruptor (C1, C2) in turn protected by a thin and flexible probe (S, B) which on the one hand transmits the external mechanical control movement (P) and on... | 11/22/1988 |
| 4722435 | Case for documents There is described a case for valuable documents, such as notably checks, credit cards, bank notes, etc., comprised of a box with a lid and a closure which may only be opened by inputting a code number, as well as a capsule or phial filled with a pressuri... | 02/02/1988 |
| 4232613 | Armor plated safe A safe having an armor plated housing and a armor plated door is provided with an automatic locking system for the door. Within the door an electric gear motor is disposed operating when energized the locking system. The electric motor is controlled by a ... | 11/11/1980 |
| 4060040 | Antitheft system for sales areas An antishoplifting system for premises in which goods are sold and in which signal transmitters are affixed to the articles of goods. Each of the transmitters has a continuously effective first signal emitter which cooperates with a detector at the entran... | 11/29/1977 |
