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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4618984 | Adaptive automatic discrete utterance recognition Adaptive training of a system for discrete utterance recognition during continuous speech permits single prototype utterances to be adapted to the needs of the talker, during operation, without tedious multiple recitation for training of prototypes. Initi... | 10/21/1986 |
| 4570746 | Wind/breath screen for a microphone An effective wind/breath screen for a microphone is described. The wind/breath screen includes a rigid perforated structure for enclosing the microphone. The microphone being physically isolated from the rigid perforated structure by a surrounding pad of ... | 02/18/1986 |
