Granted Patent
Utility
US 5,262,002 · App. 07/955,464
Method for manufacturing a trench structure in a substrate
Inventors:
Virinder Grewal, Siegfried Schwarzl
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Oct 2, 1992
Inventors
Virinder Grewal
Siegfried Schwarzl
Assignee (at issue)
Siemens Aktiengesellschaft
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.