Granted Patent
Utility
US 5,223,097 · App. 07/368,972
Method for controlling pitch on a paper-making machine
Inventor:
Thord Hassler
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Jun 20, 1989
Inventor
Thord Hassler
Assignee (at issue)
W. R. Grace 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.