Granted Patent
Utility
US 4,682,298 · App. 06/662,093
System for deriving a measuring signal in a heating system
Inventor:
Wolfram K. Andre
Patented Case
View Patent ↗
Granted: Jul 21, 1987
Filed: Oct 18, 1984
Inventor
Wolfram K. Andre
Assignee (at issue)
Kurt Wolf & Co. KG
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.