U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"

The Quarterly Review ; March edition, 1825

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Assignee: Royal Flush

Location: 1979Inc.
No. of patents: 1

Number	Title	Issue Date
4162549	Filtering elements A back-washable filtering element, especially for use with pumps, and more particularly for use with pumps that handle liquids with solid material entrained therein, consists of a helical coil spring disposed in a flow path for the liquid to be filtered. ...	07/31/1979