Inventor · disambiguated record
Charles P. Spencer
Also filed as: SPENCER CHARLES P
15 granted patents·704 citations·filing 1987–1999
95Inventor score
Top patents by PatentIndex Score
15 records- 0190US4825776ARailway truck friction shoe with resilient padsAMSTED IND INC·Filed 1987·Granted May 2, 1989·63 cites·6 claims
- 0289US5481986ALightweight truck sideframeAMSTED IND INCOPORATED·Filed 1994·Granted Jan 9, 1996·90 cites·7 claims
- 0387US5746137ARailcar truck bearing adapter constructionAMSTED IND INC·Filed 1996·Granted May 5, 1998·70 cites·5 claims
- 0487US5086708ARailcar truck bolster with immobilized friction shoesAMSTED IND INC·Filed 1990·Granted Feb 11, 1992·60 cites·4 claims
- 0587US4825775ARailcar truck bolster with preassembled friction shoesAMSTED IND INC·Filed 1987·Granted May 2, 1989·64 cites·6 claims
- 0685US5722327ADevice for improving warp stiffness of a railcar truckAMSTED IND INC·Filed 1995·Granted Mar 3, 1998·61 cites·57 claims
- 0784US6186075B1Side frame-bolster interface for railcar truck assemblyAMSTED IND INC·Filed 1998·Granted Feb 13, 2001·56 cites·16 claims
- 0883US6227122B1Side frame-bolster interface for railcar truck assemblyAMSTED IND INC·Filed 1999·Granted May 8, 2001·52 cites·15 claims
- 0983US5086707ASelf adjusting constant contact side bearing for railcarsAMSTED IND INC·Filed 1991·Granted Feb 11, 1992·57 cites·20 claims
- 1081US5921186ABolster land arrangement for a railcar truckAMSTED IND INC·Filed 1997·Granted Jul 13, 1999·51 cites·26 claims
- 1173US4892324AFifth wheel mounting padAMSTED IND INC·Filed 1988·Granted Jan 9, 1990·29 cites·12 claims
- 1270US4926757AElectrically grounded railway truckAMSTED IND INC·Filed 1989·Granted May 22, 1990·25 cites·1 claims
- 1353US5097973ARailcar articulated connector and wedge shim thereforeAMSTED IND INC·Filed 1991·Granted Mar 24, 1992·15 cites·4 claims
- 1433US5573126AGravity wedge for a slackless railcar connector assemblyAMSTED IND INC·Filed 1996·Granted Nov 12, 1996·7 cites·8 claims
- 1532US5746136ADynamically stable, lightweight railcar support systemAMSTED IND INC·Filed 1996·Granted May 5, 1998·4 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →