Pipe fitting

Details Pipe fitting Pipe fitting

1992-03-30

1994-05-24

Reid, Stella

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

Patent

active

D03472710

REFERENCES:
patent: 567231 (1896-09-01), Glauber
patent: 850023 (1907-04-01), Lewis
patent: 925762 (1909-06-01), Eager
patent: 1722676 (1929-07-01), Parker
patent: 2086007 (1937-07-01), Tompkins
patent: 2215318 (1940-09-01), Bristol
patent: 2449754 (1948-09-01), Seitz
patent: 3598157 (1971-08-01), Farr et al.
patent: 4898494 (1990-02-01), Ellis
patent: 5007664 (1991-04-01), Mann
patent: 5027665 (1991-07-01), Hayward
patent: 5141255 (1992-08-01), Hanaoka
patent: 5143408 (1992-09-01), Holtsmark
Brochure of Northern Pipe Products, Fargo, North Dakota, undated but admitted to be prior art.

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