Granted Patent
Utility
US 5,886,992 · App. 08/839,610
Frame synchronized ring system and method
Inventors:
K. Pertti T. Raatikainen, Juha E. Zidbeck, Olli Martikainen
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Apr 15, 1997
Inventors
K. Pertti T. Raatikainen
Juha E. Zidbeck
Olli Martikainen
Assignee (at issue)
VALTION TEKNILLINEN TUTKIMUSKESKUS
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.