Radiant energy – Invisible radiation responsive nonelectric signalling – Photographic type
Patent
1976-04-09
1977-07-12
Church, Craig E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Photographic type
250476, H05G 128
Patent
active
040356531
ABSTRACT:
An identification tag adapted to be employed in making X-ray pictures is provided with a plastic base having reinforcing means which are relatively transparent to X-rays embedded therein and defining an opening through which X-rays freely pass. One or more symbols such as letters, numbers or the like formed of material which is substantially opaque to X-rays are positioned in the opening in the reinforcing material and embedded in the plastic body of the tag.
REFERENCES:
patent: 2257933 (1941-10-01), Belknap
patent: 2939958 (1960-06-01), Anderson
patent: 3518428 (1970-06-01), Ring
patent: 3668394 (1972-06-01), Panzer
patent: 3828454 (1974-08-01), Hafner
Church Craig E.
Kane John J.
Sperry Albert
Zoda Frederick A.
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