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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7367984 | Methods and apparatus for sizing fresh donor heart valves A fresh donor tissue valve isolation annulus size comprising a handle and trigger or crank knob manipulated by the user moves a movable probe into proximity with a stationary probe so that the probes can be inserted into the tissue valve lumen. The user releases the... | 05/06/2008 |
| 7275336 | Distance measuring instrument for pedicle screws The invention relates to a distance measuring instrument for pedicle screws which detects the spacing between two pedicle screws (3, 3′) with the ends (26, 27) of two crossing limbs (11, 12) and displays it on a cross-bar (25) fixedly c... | 10/02/2007 |
| 6073360 | Instrument mount with spring-loaded clamp A mount for mounting a measuring instrument, such as an electronic measuring transducer. The mount includes a spring operated clamp assembly for attaching the mount to a first part with a reference surface engaging a desired location on the first part. In... | 06/13/2000 |
| 5815938 | Pneumatic hose coupler gage A gage according to the present invention for use in measuring engagement parts of a pneumatic hose coupler and including a body and a spring loaded contact rotatably mounted to the body. The body includes an alignment part for locating the gage on the co... | 10/06/1998 |
