Inventor · disambiguated record
Fritz Lüttgens
Also filed as: LUETTGENS FRITZ · LUTTGENS FRITZ · LüTTGENS FRITZ
17 granted patents·6 pending applications·163 citations·filing 1997–2022
94Inventor score
Top patents by PatentIndex Score
23 records- 0175US7363714B2Pencil sharpenerKUM LTD·Filed 2006·Granted Apr 29, 2008·7 cites·15 claims
- 0275US6301791B1Sharpener for soft-core pencilsKUM LTD·Filed 2000·Granted Oct 16, 2001·20 cites·14 claims
- 0374US6397479B1Sharpener, in particular for soft-core pencilsKUM LTD·Filed 2000·Granted Jun 4, 2002·19 cites·36 claims
- 0468US8769835B2Pencil sharpener and method of producing itLüTTGENS FRITZ·Filed 2006·Granted Jul 8, 2014·3 cites·26 claims
- 0567US7225547B2Pencil sharpenerKUM LTD·Filed 2004·Granted Jun 5, 2007·12 cites·3 claims
- 0667US6286218B1Sharpener, in particular for soft-core pencilsKUM LTD·Filed 1999·Granted Sep 11, 2001·27 cites·17 claims
- 0766US11999185B2Pencil sharpenerLUETTGENS FRITZ·Filed 2022·Granted Jun 4, 2024·0 cites·3 claims
- 0862US8042278B2Compasses writing implementLUETTGENS FRITZ·Filed 2009·Granted Oct 25, 2011·1 cites·12 claims
- 0962US6976314B2Sharpener for soft-core pencilsKUM LTD IE TRIM·Filed 2002·Granted Dec 20, 2005·10 cites·11 claims
- 1058US6381856B2Hand-held sharpener as a container-type sharpenerKUM LTD·Filed 2001·Granted May 7, 2002·7 cites·13 claims
- 1155US6634108B2Sharpener for sharpening a soft-core pencilKUM LTD·Filed 2002·Granted Oct 21, 2003·5 cites·8 claims
- 1254US6334256B1Sharpener unitKUM LTD·Filed 2000·Granted Jan 1, 2002·5 cites·14 claims
- 1354US5894669ASharpener for soft core pencilsKUM GMBH & CO·Filed 1997·Granted Apr 20, 1999·20 cites·10 claims
- 1451US7036231B2Sharpener for an oval pencilKUM LTD·Filed 2004·Granted May 2, 2006·3 cites·9 claims
- 1549US6722803B2Self-cleaning pencilKUM LTD·Filed 2002·Granted Apr 20, 2004·3 cites·30 claims
- 1649US2008178476A1Sharpener BladeKUM LTD·Filed 2008·Application pending·0 cites
- 1749US2006080846A1Sharpener with integrated pencil capKUM LTD·Filed 2005·Application pending·0 cites
- 1847US2007172679A1Office or cosmetics articleKUM LTD·Filed 2007·Application pending·0 cites
- 1945US2006242846A1Pencil sharpenerKUM LTD·Filed 2005·Application pending·0 cites
- 2044US6279237B1SharpenerKUM LTD·Filed 1999·Granted Aug 28, 2001·11 cites·9 claims
- 2143US2018281505A1Pencil sharpener having a guide element for discharging shavingsLUETTGENS FRITZ·Filed 2018·Application pending·0 cites
- 2238US5845406ASoft core pencil sharpener including cleaning shaperKUM GMBH & CO KG KUNSTSTOFF UN·Filed 1997·Granted Dec 8, 1998·10 cites·14 claims
- 2337US2001052188A1Holding device for a sharpenerFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →