Roof gutter guard

Details Roof gutter guard Roof gutter guard

1987-01-12

1990-08-28

Word, A. Hugo

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Patent

active

D03102599

REFERENCES:
patent: D271713 (1983-12-01), Hicks
patent: 669495 (1901-03-01), Babcock
patent: 2288121 (1942-06-01), Cisar et al.
patent: 3297285 (1967-01-01), Simmons
patent: 3550381 (1970-12-01), South
patent: 4247397 (1981-01-01), Dobosi
patent: 4254595 (1981-03-01), Crosslen
patent: 4467570 (1984-08-01), Kriegel
patent: 4553357 (1985-11-01), Pepper

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