Radiant energy – Invisible radiation responsive nonelectric signalling – Photographic type
Patent
1980-02-15
1981-10-13
Smith, Alfred E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Photographic type
A61B 614
Patent
active
042950503
ABSTRACT:
An instrument for use in odontologic X-ray photography comprises an elongated plate-like bite block extending at right angles to an X-ray film support and integrally connected to an arm perpendicular to the longitudinal direction of the block. The instrument also has means for receiving a guide pin facilitating correct orientation of the X-ray camera relatively the film.
REFERENCES:
patent: 1404171 (1922-01-01), Waite
patent: 1405217 (1922-01-01), Houser
Grigsby T. N.
Smith Alfred E.
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