Granted Patent
Utility
US 4,810,964 · App. 06/821,045
Method and apparatus for measuring the distance between a measuring transducer and an opposing surface, particularly with paper pulp equipment
Inventors:
Bertil Granberg, Bert R. Lanne
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Jan 22, 1986
Inventors
Bertil Granberg
Bert R. Lanne
Assignee (at issue)
Kamyr AB
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.