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Patents
Patents Assigned to Devin S. Davis
Patents Assigned to Devin S. Davis
Sight check valve
Patent number:
4022245
Abstract:
A swing type check valve is connected by a double compression coupling to an irrigation pipe. The compression sleeve over the valve is transparent so that the valve may be sight checked or visually inspected.
Type:
Grant
Filed:
April 8, 1976
Date of Patent:
May 10, 1977
Assignee:
Devin S. Davis
Inventor:
Leon E. Davis