Granted Patent
Utility
US 4,609,771 · App. 06/701,320
Tandem junction solar cell devices incorporating improved microcrystalline p-doped semiconductor alloy material
Inventors:
Subhendu Guha, James Kulman
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Feb 13, 1985
Inventors
Subhendu Guha
James Kulman
Assignee (at issue)
Sovonics Solar Systems
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.