Granted Patent
Utility
US 5,215,312 · App. 07/836,152
Housing with a pressure-equalizing element which is retained water-tightly around the edges within a housing wall opening
Inventors:
Wolfram Knappe, Peter Michel
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Feb 13, 1992
Inventors
Wolfram Knappe
Peter Michel
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.