Sprinkler

Details Sprinkler Sprinkler

1997-04-08

1998-02-17

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Dispersal

2301

Patent

active

D03909123

REFERENCES:
patent: D164770 (1951-10-01), Griswold
patent: D180472 (1957-06-01), Cowen
patent: 211876 (1879-02-01), Wolff et al.
patent: D225328 (1972-12-01), Margrill
patent: D232088 (1974-07-01), Margrill
patent: 1758767 (1930-05-01), Taggart
patent: 2670992 (1954-03-01), Long
patent: 2937812 (1960-05-01), Cook
patent: 4498627 (1985-02-01), Arginsky
patent: 5022588 (1991-06-01), Haase
Copy of catalogue page, L. Wolff Manufacturing Co., date unknown but prior to 1996.
Business card, J. Oldani, date unknown but prior to 1996, illustrating prior sprinkler design (circle).
Photographs of Oldani sprinkler design, date unknown but prior to 1996.

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