Granted Patent
Utility
US 6,510,232 · App. 09/769,183
Electroacoustic transducer having diaphragm with coil mounting projections and interposed stabilizing walls
Inventor:
Ewald Frasl
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Jan 25, 2001
Inventor
Ewald Frasl
Assignee (at issue)
KONINKLIJKE PHILIPS ELECTRONICS NV
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.