IP Library › Granted Patent US 4,674,475
Granted Patent Utility
US 4,674,475 · App. 06/794,244

Gas fired furnace

Inventor: William N. Powis
Patented Case View Patent ↗
Granted: Jun 23, 1987 Filed: Oct 31, 1985
Inventor
William N. Powis
Assignee (at issue)
FL Industries, Inc.

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Quick Facts
Patent No.
US 4,674,475
App. No.
06/794,244
Filed
1985-10-31
Granted
1987-06-23
Kind
A