Micro-dot identification

Details Micro-dot identification Micro-dot identification

1978-07-10

1981-01-06

Hoffman, James R.

Radiation imagery chemistry: process, composition, or product th

Micrography, process, composition, or product other than...

427 7, G03C 508, G03C 500

Patent

active

042437342

ABSTRACT:
Micro-dots carrying indicia identifying the owner of an article and the method of preparing and using such micro-dots. The micro-dots are small pieces of foil of any of several shapes with square being the preferred shape, and having an area defined by sides having an extent in the nature of 0.007 inch. Printed on the area of each dot is indicia identifying a particular owner. The method consists essentially of printing the indicia in multiple units on a large plate with the images being reduced in size by step photographing process, which results in a glass slide having the negatives of the images developed thereon. These images are transferred photographically to a piece of film of the same size which is cut into the individual dots. It is then immersed in a fluid, such as a clear resin, and applied to an article that is to be protected. The article or any part thereof with the micro-dots thereon is retrieved and examined by a microscope to identify the owner.

REFERENCES:
patent: 3272533 (1966-09-01), Allen
patent: 3470120 (1969-09-01), Sasai
patent: 3698645 (1972-10-01), Coffey
patent: 3772200 (1973-11-01), Livesay
patent: 3861886 (1975-01-01), Meloy
patent: 3897284 (1975-07-01), Livesay
patent: 4053433 (1977-10-01), Lee
patent: 4066280 (1978-01-01), Lacapria

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