Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7495885 | Multilayer capacitor A multilayer capacitor has a capacitor element, inner electrodes arranged within the capacitor element, and first to fourth terminal electrodes. Electrode parts of the first to fourth terminal electrodes cover ridges formed between first and third side faces, first ... | 02/24/2009 |