Granted Patent
Utility
US 6,502,774 · App. 09/520,778
Refiner disk sensor and sensor refiner disk
Inventors:
Ola M. Johansson, Timothy L. Wulf
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Mar 8, 2000
Inventors
Ola M. Johansson
Timothy L. Wulf
Assignee (at issue)
J & L Fiber Services, Inc.
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.