Ear plug

Details Ear plug Ear plug

1975-08-28

1976-12-14

Burke, Wallace R.

Building units and construction elements

Architectural stock material

Post or beam

D2501

Patent

active

D02427435

REFERENCES:
patent: 186422 (1877-01-01), Hackett et al.
patent: D235483 (1975-06-01), Leight
patent: 955276 (1910-04-01), Lopizich
patent: 1040404 (1912-10-01), Poindexter
patent: 2393005 (1946-01-01), Veneklasen
patent: 3259128 (1966-07-01), Leight

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