Assignee
KEYSTONE ENG & MFG CORP
US·4 granted patents·271 citations·filing 1990–1997
Top patents by PatentIndex Score
4 records- 0193US5884979ACutting bit holder and support surfaceKEYSTONE ENG & MFG CORP·Filed 1997·Granted Mar 23, 1999·113 cites·24 claims
- 0288US5842747AApparatus for roadway surface reclaiming drumKEYSTONE ENG & MFG CORP·Filed 1997·Granted Dec 1, 1998·71 cites·21 claims
- 0382US5052757AFlighting section and tooth holderKEYSTONE ENG & MFG CORP·Filed 1990·Granted Oct 1, 1991·56 cites·11 claims
- 0462US5582468ADouble tooth cutterKEYSTONE ENG & MFG CORP·Filed 1995·Granted Dec 10, 1996·31 cites·19 claims
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