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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4991084 | N×M round robin order arbitrating switching matrix system An N×M matrix adapted to couple N inputs from N processor to M basic storage modules is disclosed. The system includes arbitrators and gating means for each output responsive to request signals for simultaneously coupling data from a plurality of process... | 02/05/1991 |
| 4965712 | Transformer having plural-turn core A transformer has a multi-turn magnetic core about a loop of conductor. A bridge transformer has one turn of the core about one half of the conductor loop and a second turn of the core about the other half of the conductor loop, and an electrical center t... | 10/23/1990 |
| 4939735 | Information handling system having serial channel to control unit link An information handling system includes a processor with one or more channels for communicating to peripheral devices controlled by peripheral device controllers, and one or more serial data links between the channels and the peripheral controllers. Data ... | 07/03/1990 |
