Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1979-04-16
1981-12-01
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02621339
REFERENCES:
patent: D54781 (1920-03-01), Sheffner
patent: 589813 (1897-09-01), Campbell
patent: 655380 (1900-08-01), Stroh
patent: 670229 (1901-03-01), Hammer
patent: 1225616 (1917-05-01), Gough
patent: 1666802 (1928-04-01), Von Allmen
patent: 1806278 (1931-05-01), Boker
Largen James R.
Teknor Apex Company
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