Two-way mail box

Miscellaneous – Vault – safe – or depository – Mailbox

Patent

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Patent

active

D03244440

REFERENCES:
patent: D218490 (1970-08-01), Blumberg
patent: D254635 (1980-04-01), Earle
patent: D263514 (1982-03-01), Paparella
patent: D306228 (1990-02-01), Hoffman et al.
patent: D313106 (1990-12-01), Hoffman et al.
patent: 491534 (1893-02-01), Cushing et al.
patent: 2578692 (1951-12-01), Gieseler

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