Granted Patent
Utility
US 6,575,916 · App. 09/534,813
Apparatus and method for detecting very low frequency acoustic signals
Inventors:
Michael E. Halleck, Michael D. Halleck, Michael L. Lehrman
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Mar 24, 2000
Inventors
Michael E. Halleck
Michael D. Halleck
Michael L. Lehrman
Assignee (at issue)
iLife Solutions, 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.