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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4183092 | Cubic magnetic core storage memory system A cubic magnetic core storage memory system which results in increased packing density of the core elements and more economical construction. Memory cores are bonded flat to carrier planes. The carrier planes are then stacked, forming a three dimensional ... | 01/08/1980 |
| 4159862 | Removable female polarizing guide for electrical connectors A female guidance and polarizing means for either the male or female parts of a separable electrical connector which carry mating eletrical contacts. The polarizing and guide means is mounted in predetermined positions on either the male or female connect... | 07/03/1979 |
| 4060123 | Energy saving temperature control apparatus An improved energy saving control apparatus particularly designed for providing energy saving control of individual room heating and cooling units in direct response to the active occupancy status of the room. Switching means selectively interrupt energiz... | 11/29/1977 |
| 4030792 | Tuning fork connector An apparatus for connecting blade type male contacts to external circuitry. Tuning fork type female contacts are press fitted into a printed circuit board and an insulative housing is snapped over the top of the contacts. The structure of the insulative h... | 06/21/1977 |
