Granted Patent
Utility
US 5,528,215 · App. 08/251,462
Building automation system having expansion modules
Inventors:
Raymond Siu, Robert Mueller, Thomas F. Racke
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: May 31, 1994
Inventors
Raymond Siu
Robert Mueller
Thomas F. Racke
Assignee (at issue)
Landis & Gyr Powers, Inc.
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.