Granted Patent
Utility
US 6,038,327 · App. 09/033,201
Electroacoustic transducer comprising a closing member for closing the rear volume of the transducer
Inventors:
Peter Bleim, Ewald Frasl, Erich Klein, Ernst Ruberl
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: Mar 2, 1998
Inventors
Peter Bleim
Ewald Frasl
Erich Klein
Ernst Ruberl
Assignee (at issue)
U.S. Philips Corporation
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.