Granted Patent
Utility
US 6,542,421 · App. 09/968,609
Semiconductor memory device with redundancy circuit
Inventors:
Hiroyuki Sugamoto, Yasushige Ogawa
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Oct 2, 2001
Inventors
Hiroyuki Sugamoto
Yasushige Ogawa
Assignee (at issue)
Fujitsu 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.