Assignee
MUTSCHLER OTTO
DE·10 granted patents·109 citations·filing 1975–1985
Top patents by PatentIndex Score
10 records- 0161US4334622AStand for holding and sealingly retaining India ink drawing implementsMUTSCHLER OTTO·Filed 1979·Granted Jun 15, 1982·15 cites·6 claims
- 0260US4355726AStand for holding and sealingly retaining India ink drawing implementsMUTSCHLER OTTO·Filed 1980·Granted Oct 26, 1982·17 cites·8 claims
- 0356US4645367AWriting implement venting systemMUTSCHLER OTTO·Filed 1984·Granted Feb 24, 1987·16 cites·5 claims
- 0452US4493575AReleasable protective holder for a writing implementMUTSCHLER OTTO·Filed 1982·Granted Jan 15, 1985·12 cites·4 claims
- 0552US4239408AFountain pen with improved ink flow controlMUTSCHLER OTTO·Filed 1979·Granted Dec 16, 1980·11 cites·8 claims
- 0651US4728214AInk duct for tubular stylusesMUTSCHLER OTTO·Filed 1985·Granted Mar 1, 1988·14 cites·3 claims
- 0744US3941491AFountain penMUTSCHLER OTTO·Filed 1975·Granted Mar 2, 1976·8 cites·10 claims
- 0840US4390299AIndia ink drawing implementMUTSCHLER OTTO·Filed 1981·Granted Jun 28, 1983·7 cites·3 claims
- 0938US4461591AInk writing implementMUTSCHLER OTTO·Filed 1982·Granted Jul 24, 1984·6 cites·3 claims
- 1032US3938899AStylographMUTSCHLER OTTO·Filed 1975·Granted Feb 17, 1976·3 cites·7 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →