Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 5957065 | Cremators A cremator comprises a primary combustion chamber for receiving through a charge door thereof a coffin or other object to be cremated and being provided with a first burner, a secondary combustion chamber (e.g. in the form of a tube of thermally conductiv... | 09/28/1999 |