Granted Patent
Utility
US 5,437,910 · App. 08/095,751
Multi-ply filter lasminate/composite for manufacturing vacuum cleaner filter bags
Inventors:
Ernst Raabe, Albrecht Klimmek
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Jul 21, 1993
Inventors
Ernst Raabe
Albrecht Klimmek
Assignee (at issue)
Steinbeis Gessner GmbH
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.