Granted Patent
Utility
US 5,452,267 · App. 08/187,648
Midrange ultrasonic transducer
Inventor:
Lev Spevak
Patented Case
View Patent ↗
Granted: Sep 19, 1995
Filed: Jan 27, 1994
Inventor
Lev Spevak
Assignee (at issue)
Magnetrol International, Incorporated
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.