Granted Patent
Utility
US 5,341,987 · App. 07/973,265
Temperature control flow valve
Inventor:
Rand H. Ackroyd
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Nov 9, 1992
Inventor
Rand H. Ackroyd
Assignee (at issue)
Watts Investment Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.