Individual holder
HAMMER WALTER F
US·3 granted patents·1 pending application·6 citations·filing 2011–2023
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0177US8656600B2Pencil sharpener configured to work with a power drillHAMMER WALTER F·Filed 2011·Granted Feb 25, 2014·6 cites·5 claims
- 0237US2011258863A1Pencil SharpenerHAMMER WALTER F·Filed 2011·Application pending·0 cites
- 0335USD1089403SPencil sharpenerHAMMER WALTER F·Filed 2023·Granted Aug 19, 2025·0 cites·1 claims
- 0433USD1057013SPencil sharpenerHAMMER WALTER F·Filed 2022·Granted Jan 7, 2025·0 cites·1 claims
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