Granted Patent
Utility
US 6,285,770 · App. 09/029,062
Noticeboards incorporating loudspeakers
Inventors:
Henry Azima, Martin Colloms, Neil John Harris
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: May 13, 1998
Inventors
Henry Azima
Martin Colloms
Neil John Harris
Assignee (at issue)
New Transducers Limited
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.