Granted Patent
Utility
US 5,406,991 · App. 08/195,813
Plastic filler insert for a writing fluid converter
Inventors:
Jurgen Rathenberg, Petra Maurer, Klaus Nicolai
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Jan 27, 1994
Inventors
Jurgen Rathenberg
Petra Maurer
Klaus Nicolai
Assignee (at issue)
rotring-werke Riepe 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.