Granted Patent
Utility
US 6,721,540 · App. 09/700,854
Electronic device
Inventor:
Motomu Hayakawa
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Nov 17, 2000
Inventor
Motomu Hayakawa
Assignee (at issue)
SEIKO EPSON 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.