Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6349282 | Compound words in speech recognition systems An automatic speech recognition system includes a recognition engine, a compound lexicon, and a compounder. The recognition engine generates a recognition result having a sequence of recognized words representative of an input utterance. The words in the ... | 02/19/2002 |