Granted Patent
Utility
US 5,221,541 · App. 07/757,742
Extruder head for elastomeric material
Inventors:
Gaetan Arbour, Gerardo P. Elia, Margaret N. Elia, Leonard R. Holm, Gilles Lavallee
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Sep 11, 1991
Inventors
Gaetan Arbour
Gerardo P. Elia
Margaret N. Elia
Leonard R. Holm
Gilles Lavallee
Assignee (at issue)
Bridgestone Firestone
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.