Door guard

Details Door guard Door guard

1989-04-28

1991-09-10

Vinson, Brian N.

Tools and hardware

Locking or closing device

Lock, latch or bolt

Patent

active

D03197743

REFERENCES:
patent: 144222 (1873-11-01), Perkins
patent: 179308 (1876-06-01), Hill
patent: 372326 (1887-11-01), Palmenberg
patent: 465185 (1891-12-01), Mason
patent: 768528 (1904-08-01), Kalb et al.
patent: 773579 (1904-11-01), De Mayo
patent: 937094 (1909-10-01), Rosenberg
patent: 1154862 (1915-09-01), Hoagland
patent: 1286774 (1918-12-01), Rehe
patent: 1497500 (1922-11-01), Gorowitz
patent: 2102729 (1936-08-01), McDonald
patent: 4062578 (1977-12-01), Chen
patent: 4229030 (1980-10-01), Tarragona Corbella
patent: 4408789 (1983-10-01), Miller
patent: 4684159 (1987-08-01), Hutter
patent: 4900075 (1990-02-01), Smith

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