Surgery – Truss – Perineal
Patent
1976-03-19
1977-11-15
Howell, Kyle L.
Surgery
Truss
Perineal
A61B 502
Patent
active
040581187
ABSTRACT:
A miniaturized cardiotachometer is worn by a user typically adjacent the volar aspect of the wrist or the temple to provide the user with a numerical readout of his or her pulse rate. The time between two heartbeats is measured by the number of pulses from a fixed frequency source that occur. The measurement is made after a predetermined delay to eliminate or reduce noise signals, the number of pulses of the fixed frequency being converted into the pulse rate and displayed numerically.
REFERENCES:
patent: RE28529 (1975-08-01), Edenhofer
patent: 3661147 (1972-05-01), Mason
patent: 3717140 (1973-02-01), Greenwood
patent: 3742937 (1973-07-01), Manuel et al.
patent: 3773038 (1973-11-01), Smith et al.
patent: 3807388 (1974-04-01), Orr et al.
Stupay Lawrence John
Truesdell Carl Frederick
Arbuckle F. M.
Bunker Ramo Corporation
Gray Richard
Hosier Gerald D.
Howell Kyle L.
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