Granted Patent
Utility
US 5,524,151 · App. 08/422,666
Electroacoustic transducer having a mask
Inventor:
Peter Bleim
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Apr 10, 1995
Inventor
Peter Bleim
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.