Inventor · disambiguated record
Johannes Lefferts
Also filed as: LEFFERTS JOHANNES
11 granted patents·207 citations·filing 1980–1995
91Inventor score
Top patents by PatentIndex Score
11 records- 0191US4346138ASieve belt of thermosettable synthetic resin helices for papermaking machineSITEG SIEBTECH GMBH·Filed 1980·Granted Aug 24, 1982·61 cites·5 claims
- 0280US5514456ASpiral link belt with low permeability to air and method for its productionSITEG SIEBTECH GMBH·Filed 1995·Granted May 7, 1996·32 cites·10 claims
- 0375US4796749ASpiral link belt with composite helicesSITEG SIEBTECH GMBH·Filed 1987·Granted Jan 10, 1989·26 cites·7 claims
- 0474US4362776ASieve belt with filler materialSITEG SIEBTECH GMBH·Filed 1981·Granted Dec 7, 1982·30 cites·10 claims
- 0558US4575472ADouble helix, spiral belts made therefromSITEG SIEBTECH GMBH·Filed 1984·Granted Mar 11, 1986·14 cites·2 claims
- 0657US4392902AMethod for producing a sieve belt of thermosettable synthetic resin helices for a papermaking machineSTEG SIEBTECHNIK GMBH·Filed 1982·Granted Jul 12, 1983·17 cites·5 claims
- 0742US5183442ADouble helix, method of making same and spiral link belt made therefromSITEG SIEBTECH GMBH·Filed 1991·Granted Feb 2, 1993·10 cites·5 claims
- 0840US4696852ASpiral link belt of reduced air permeability and method of producing sameSITEG SIEBTECH GMBH·Filed 1986·Granted Sep 29, 1987·6 cites·4 claims
- 0935US4650709AHelix structures for use in forming helix beltsSITEG SIEBTECH GMBH·Filed 1985·Granted Mar 17, 1987·4 cites·4 claims
- 1031US4564992AMethod for producing helix structures for use in forming helix beltsSITEG SIEBTECH GMBH·Filed 1983·Granted Jan 21, 1986·2 cites·6 claims
- 1128US4451957AApparatus for joining the ends of a belt to make it endlessSIEG SIEBTECHNIK GMBH·Filed 1981·Granted Jun 5, 1984·5 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →