Granted Patent
Utility
US 6,407,362 · App. 09/359,993
Protective device for producing very small bores in tubular components, and method for producing bores
Inventors:
Gerhard Schmid, Hartmut Gross
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Jul 22, 1999
Inventors
Gerhard Schmid
Hartmut Gross
Assignee (at issue)
Hydraulik-Ring GmbH
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.