Granted Patent
Utility
US 6,400,225 · App. 09/716,547
Differential difference amplifier for amplifying small signals close to zero volts
Inventor:
Marinus Wilhelmus Kruiskamp
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Nov 20, 2000
Inventor
Marinus Wilhelmus Kruiskamp
Assignee (at issue)
NATIONAL SEMICONDUCTOR 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.