Granted Patent
Utility
US 5,680,132 · App. 08/573,039
Digital to analog converter having a string of resistors
Inventor:
Hiroyuki Kobatake
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Dec 15, 1995
Inventor
Hiroyuki Kobatake
Assignee (at issue)
NEC 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.