Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6238296 | Simulated boat device A simulated boat device for having directional control that simulates a boat rudder. The simulated boat device includes a hollow structure forming the hull of the boat device. The hollow structure has a bottom wall, a top wall, a front portion, a back por... | 05/29/2001 |
| 4617871 | Steerable wind-powered vehicle The present invention concerns a steerable wind-powered vehicle, which comprises a base supported on at least two wheels, skis, skates or hydrofoils, at least one of the wheels, skis, skates or hydrofoils being arranged to be steerable, a mast carrying a ... | 10/21/1986 |