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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4935882 | Probability adaptation for arithmetic coders Apparatus and method for adapting the estimated probability of either the less likely or more likely outcome (event) of a binary decision in a sequence of binary decisions involves the up-dating of the estimated probability in response to the renormalizat... | 06/19/1990 |
| 4891643 | Arithmetic coding data compression/de-compression by selectively employed, diverse arithmetic coding encoders and decoders A data compression/de-compression system includes a first arithmetic coding encoder, characterized by a first set of encoding conventions, which encoder generates a code stream that points to an interval along a number line in response to decision event i... | 01/02/1990 |
