Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6102986 | Method of inhibiting gas hydrate formation The present application relates to a method for inhibiting gas hydrate formation, which involves the addition to the aqueous phase, in the case of multiphase mixtures comprising water, gas and possibly condensate, of an amine oxide or salts thereof.... | 08/15/2000 |