Protected philatelic item

Details Protected philatelic item Protected philatelic item

1990-02-28

1992-06-09

Bell, Paul A.

Printed matter

Stamp

283 70, 283117, B42D 1500

Patent

active

051200899

ABSTRACT:
The present invention relates to a method of protecting a philatelic item for alteration, which philatelic item bears a mark identifying an expert or owner of the item and possibly an additional distinguishable mark specific to the philatelic item. The invention further relates to a method of preventing fraudulent reuse of stamps.

REFERENCES:
patent: 53081 (1866-03-01), Loewenberg
patent: 79157 (1868-06-01), Sturgeon
patent: 101020 (1870-03-01), Jones
patent: 1005696 (1911-10-01), Czettel
patent: 1985834 (1934-12-01), Lawrence
patent: 2250197 (1941-07-01), Humphner
patent: 2604710 (1952-07-01), Beaune
patent: 4121856 (1978-10-01), Brunette
patent: 4121961 (1978-10-01), Brunette et al.
patent: 4640714 (1987-02-01), Kagota

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