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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4428319 | Sock skimmer deployment Apparatus for removing oil from the surface of a body of water including, an at least partially flexible, elongated chamber having an open, at least partially submerged front for receiving water and oil thereinto during relative movement between the chamb... | 01/31/1984 |
| 4231312 | Flexible ocean upwelling pipe In an ocean thermal energy conversion facility, a cold water riser pipe is releasably supported at its upper end by the hull of the floating facility. The pipe is substantially vertical and has its lower end far below the hull above the ocean floor. The p... | 11/04/1980 |
| 3943875 | Method and apparatus for launching and recovering submersibles A method of launching and recovering self-propelled submersibles by using a drogue below the surface of the water where comparatively stable conditions exist. A probe on the submersible is unlatched from or latched to the drogue during relative movement t... | 03/16/1976 |
