PROCESS FOR RECORDING AND RETRIEVING INFORMATION EMPLOYING PHOTOLUMINESCENT INKS WHICH LUMINESCE UNDER ULTRAVIOLET ILLUMINATION
United States Patent 3473027
US Patent References:
Penetrating ray emission coding
- - 2957079

Tag reading product and apparatus
- - 3059112


Inventors:
Freeman, Mark Phillips
Halverson, Frederick
Publication Date:
10/14/1969
View Patent Images:
Download PDF 3473027 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
AMERICAN CYANAMID CO
Primary Class:
250/365
Other Classes:
235/462.040, 250/461.100, 235/468, 235/491, 250/271, 235/469
International Classes:
B44F1/12; G01N21/38




<- Previous Patent (DENTAL INSTRUMENTS F...)   |   Next Patent (X-RAY TUBE HOUSING C...) ->