Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4819233 | Verification of computer software A computer program is verified, unit by unit, by automatically instrumentating the code and generating a test driver program which executes all branches of an instrumented code unit. The code is instrumented by operating processors to standardize the code... | 04/04/1989 |