Tools and hardware – Locking or closing device – Lock – latch or bolt
patent: D219639 (1971-01-01), Hawkins
patent: 3626507 (1971-12-01), Hawkins
patent: 3751087 (1973-08-01), Hawkins
patent: 3874716 (1975-04-01), Bancroft
Burke Wallace R.
Gandy James M.
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