Radiant energy – Invisible radiation responsive nonelectric signalling – Photographic type
Patent
1974-09-03
1976-02-03
Willis, Davis L.
Radiant energy
Invisible radiation responsive nonelectric signalling
Photographic type
250521, G03B 4118
Patent
active
039366430
ABSTRACT:
A disposable one-piece holder of molded styrofoam or similar lightweight material for dental X-ray film, comprising two integral portions one of which is relatively thin and is adapted for gripping by the teeth, and the other portion being in extension thereof and thicker and having an edge located at right angles to the plane of the thinner portion for holding the film.
REFERENCES:
patent: 2777068 (1957-01-01), Bowser
patent: 3444371 (1969-05-01), Via, Jr.
Fay Charles R.
Sterling Drug Inc.
Willis Davis L.
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