Lawn sprinkler

Details Lawn sprinkler Lawn sprinkler

1997-07-30

1998-08-18

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Dispersal

D23221, 2301

Patent

active

D03972038

REFERENCES:
patent: D119250 (1940-02-01), Hoffman
patent: D163470 (1951-05-01), Nelson
patent: D295213 (1988-04-01), Hattori
patent: D297042 (1988-08-01), Evans
patent: D358449 (1995-05-01), Ford
Nelson Catalog; # 1950 Rainswirl circle sprinkler; p. 6, Jan. 1986.
Sherman Lawn and Garden catalog; #RS-50; p. 8, 1996.

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