Individual holder
GROETSCHEL KARL M
DE·6 granted patents·96 citations·filing 1977–1980
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
6 records- 0185US4122682AMethods of and apparatus for applying roof mats to mine workingsGROETSCHEL KARL M·Filed 1977·Granted Oct 31, 1978·33 cites·26 claims
- 0279US4222069AMethod of and apparatus for preselecting operation of television or radio receiving and recording apparatusGROETSCHEL KARL M·Filed 1978·Granted Sep 9, 1980·27 cites·17 claims
- 0372US4251168AFastening means for roof mats for mine workingsGROETSCHEL KARL M·Filed 1978·Granted Feb 17, 1981·15 cites·12 claims
- 0451US4358159AApparatus for supporting the roof of an underground mine workingGROETSCHEL KARL M·Filed 1980·Granted Nov 9, 1982·8 cites·19 claims
- 0546US4379660AMethod of and apparatus for applying mat to the roof of a mine workingGROETSCHEL KARL M·Filed 1980·Granted Apr 12, 1983·10 cites·14 claims
- 0632US4369362ARecorder control apparatus and methodGROETSCHEL KARL M·Filed 1980·Granted Jan 18, 1983·3 cites·8 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →