Paper box flag

Details Paper box flag Paper box flag

1990-02-08

1998-06-09

Douglas, Alan P.

Miscellaneous

Vault, safe, or depository

Mailbox

D10 23, 1102

Patent

active

D03951308

REFERENCES:
patent: 3888409 (1975-06-01), Bolduc
patent: 4002291 (1977-01-01), Hodge
patent: 4007870 (1977-02-01), Hankis
patent: 4308989 (1982-01-01), Elsinger
patent: 4412646 (1983-11-01), Hollenbach

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