Radiant energy – Invisible radiation responsive nonelectric signalling – Photographic type
Patent
1978-03-29
1980-01-01
Church, Craig E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Photographic type
2504751, H05G 128
Patent
active
041818598
ABSTRACT:
In order to superimpose a millimetric measurement reticle on an exposure of a flexible radiographic film of the kind used in dentistry this invention provides a reticle device having a reticle printed on one side of a flexible support layer in radio-opaque ink, the other side of the support being self-adhesive for application to the film. A protective insoluble layer covers the printed reticle, and removable cover strips preferably cover the self-adhesive side of the device, to protect the adhesive layer until the device is about to be used.
REFERENCES:
patent: 1168177 (1916-01-01), Yoanna
patent: 3770956 (1973-11-01), Johnson
patent: 3848136 (1974-11-01), Seldin
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