Building units and construction elements – Prefabricated unit – Closure
Patent
1994-05-03
1995-07-18
Clark, Doris
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03604721
REFERENCES:
patent: D277138 (1985-01-01), Hostetler
patent: 1036721 (1912-08-01), Rockwell
patent: 1764398 (1930-06-01), Fitzgerald
patent: 3308875 (1967-03-01), Abrams
patent: 4311183 (1982-01-01), Herbst et al.
patent: 4400419 (1983-08-01), Laczynski
patent: 4477510 (1984-10-01), Johnson et al.
patent: 4522864 (1985-06-01), Humason et al.
patent: 4678690 (1987-07-01), Palmer et al.
patent: 4857401 (1989-08-01), Sieverding
Brochure distributed by American Inventors Corporation approximately during May, 1992 #R6353.
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