Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-12-06
1980-06-17
Word, A. Hugo
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D22 19, D22 99, D2304
Patent
active
D02554852
REFERENCES:
patent: 1641183 (1927-09-01), Martin et al.
patent: 3558055 (1971-01-01), Storchheim
patent: 3823873 (1974-07-01), Miller, Jr. et al.
patent: 3844478 (1974-10-01), Davis
patent: 3972993 (1976-08-01), Kobayashi et al.
patent: 3996348 (1976-12-01), Greenberg
A. H. Robins Company, Inc.
Word A. Hugo
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