Trench drain

Details Trench drain Trench drain

1978-09-26

1981-07-21

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2301

Patent

active

D02599503

REFERENCES:
patent: D213956 (1969-04-01), Jones, Jr. et al.
patent: D222354 (1971-10-01), Foltz
patent: D237493 (1975-11-01), Storm
patent: D243766 (1977-03-01), Isaacs
patent: 1978491 (1934-10-01), Gladman
patent: 2701027 (1955-02-01), Scoville
patent: 3212267 (1965-10-01), Biehn
patent: 3225545 (1965-12-01), Flegel

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