Granted Patent
Utility
US 4,549,238 · App. 06/456,641
Magnetic head slider of ceramic material
Inventors:
Friedrich Ertingshausen, Volker Heinrich, Holger Hinkel, Gerhard Kaus, Jurgen Kempf, Hans-Georg Nauth, Manfred Schrader
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Jan 10, 1983
Inventors
Friedrich Ertingshausen
Volker Heinrich
Holger Hinkel
Gerhard Kaus
Jurgen Kempf
Hans-Georg Nauth
Manfred Schrader
Assignee (at issue)
International Business Machines Corporation
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.