Inventor · disambiguated record
Walter Hammer
Also filed as: HAMMER WALTER · HAMMER WALTER F
9 granted patents·4 pending applications·82 citations·filing 1975–2023
85Inventor score
Top patents by PatentIndex Score
13 records- 0187US4015208AFrequency generator compensated as a function of at least one physical parameter of the environmentCENTRE ELECTRON HORLOGER·Filed 1975·Granted Mar 29, 1977·26 cites·13 claims
- 0277US8656600B2Pencil sharpener configured to work with a power drillHAMMER WALTER F·Filed 2011·Granted Feb 25, 2014·6 cites·5 claims
- 0366US9065776B2Addressable node unit and method for addressingTRAN LUAN-VU·Filed 2011·Granted Jun 23, 2015·4 cites·18 claims
- 0466US7099474B1Key and lock deviceASSA ABBY AB·Filed 2000·Granted Aug 29, 2006·39 cites·16 claims
- 0545US11590993B2Display of signal devices and safety device of a railway vehicleSiemens Mobility GmbH·Filed 2017·Granted Feb 28, 2023·0 cites·13 claims
- 0643US2014075681A1Pencil SharpenerHAMMER WALTER·Filed 2013·Application pending·0 cites
- 0742US11753053B2Method for operating a rail vehicle networkSiemens Mobility GmbH·Filed 2018·Granted Sep 12, 2023·0 cites·11 claims
- 0839US6863560B2Electrical power plug with secure positioning of the contact prongsFELLER GMBH·Filed 2003·Granted Mar 8, 2005·7 cites·14 claims
- 0937US2011258863A1Pencil SharpenerHAMMER WALTER F·Filed 2011·Application pending·0 cites
- 1035USD1089403SPencil sharpenerHAMMER WALTER F·Filed 2023·Granted Aug 19, 2025·0 cites·1 claims
- 1133USD1057013SPencil sharpenerHAMMER WALTER F·Filed 2022·Granted Jan 7, 2025·0 cites·1 claims
- 1224US2019288460A1PlugFELLER GMBH·Filed 2019·Application pending·0 cites
- 1323US2007141886A1Attachment partFELLER GMBH·Filed 2006·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Walter Hammer files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →