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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 4583940 | Igniter for combustible material An igniter for combustible material includes a support, an element of a material capable of being ignited by friction, a movable friction-strip having a surface portion treated to produce ignition of the element by friction, and a plate secured to the sup... | 04/22/1986 |
| 4197213 | Method and apparatus for the pyrotechnic generation of multi-component gases A method and apparatus are disclosed for pyrotechnically generating a mixture of at least two gases, substantially in a predetermined ratio, for an extended period of time, with separate pyrotechnic charges generating each component of the resultant mixtu... | 04/08/1980 |
