Granted Patent
Utility
US 6,404,690 · App. 09/845,625
Refresh drive circuit for a DRAM
Inventors:
Bret Johnson, Robert Kaiser, Helmut Schneider
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Apr 30, 2001
Inventors
Bret Johnson
Robert Kaiser
Helmut Schneider
Assignee (at issue)
Infineon Technologies AG
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.