Granted Patent
Utility
US 5,883,512 · App. 08/740,255
Checking heat exchanger tubes with an eddy-current integrity test
Inventors:
Klaus Streit, Franz Ammann
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Oct 25, 1996
Inventors
Klaus Streit
Franz Ammann
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.