Inventor · disambiguated record
Duane W. Woltjen
Also filed as: WOLTJEN DUANE W · WOLTJEN DUANE WALKER
8 granted patents·1 pending application·190 citations·filing 1975–2000
89Inventor score
Top patents by PatentIndex Score
9 records- 0188US4174621ATorque limiting overload couplingUMC IND·Filed 1977·Granted Nov 20, 1979·35 cites·16 claims
- 0286US6018841AFinishing trowel including handleMARSHALLTOWNTROWEL COMPANY·Filed 1998·Granted Feb 1, 2000·59 cites·12 claims
- 0369US5522111AFinishing trowel handleMARSHALLTOWN TROWEL CO·Filed 1994·Granted Jun 4, 1996·25 cites·43 claims
- 0466US4036374AMulti-motion parts handlerAMC IND INC·Filed 1975·Granted Jul 19, 1977·21 cites·17 claims
- 0560US5713096AFinishing trowel handleMARSHALLTOWN TROWEL CO·Filed 1996·Granted Feb 3, 1998·22 cites·11 claims
- 0654US4486983AGuides for honing headsSUNNEN PRODUCTS CO·Filed 1982·Granted Dec 11, 1984·8 cites·11 claims
- 0753US6105882ATexture material applicatorMARSHALLTOWN TROWEL CO·Filed 1998·Granted Aug 22, 2000·20 cites·8 claims
- 0829US2001052163A1Finishing trowel including handleFiled 2000·Application pending·0 cites
- 0928US4555875AMeans for attaching a replaceable stone and/or guide assembly to a master holderSUNNEN PRODUCTS CO·Filed 1985·Granted Dec 3, 1985·0 cites·29 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →