Inventor · disambiguated record
Norman R. Westfall
Also filed as: WESTFALL NORMAN R
21 granted patents·931 citations·filing 1976–1995
97Inventor score
Top patents by PatentIndex Score
21 records- 0199US5353548ACurl spring shoe based window balance systemCALDWELL MFG CO·Filed 1993·Granted Oct 11, 1994·126 cites·63 claims
- 0298US5463793ASash shoe system for curl spring window balanceCALDWELL MFG CO·Filed 1994·Granted Nov 7, 1995·100 cites·43 claims
- 0398US4701288AMethod of making articles of dissimilar polymer compositionsBAUSCH & LOMB·Filed 1985·Granted Oct 20, 1987·243 cites·18 claims
- 0488US5530991ABlock and tackle window balanceCALDWELL MFG CO·Filed 1994·Granted Jul 2, 1996·63 cites·5 claims
- 0581US5189838ATilt sash lock shoe systemCALDWELL MFG CO·Filed 1992·Granted Mar 2, 1993·48 cites·40 claims
- 0681US4941285ALift-off shoe system for tilt windowCALDWELL MFG CO·Filed 1989·Granted Jul 17, 1990·43 cites·30 claims
- 0770US5572828APin lock for tilt sash lock shoeCALDWELL MFG CO·Filed 1995·Granted Nov 12, 1996·37 cites·28 claims
- 0867US4885871AAudibly locking shoe system for take-out windowCALDWELL MFG CO·Filed 1988·Granted Dec 12, 1989·29 cites·19 claims
- 0967US4799333ALock shoe system for take-out windowCALDWELL MFG CO·Filed 1987·Granted Jan 24, 1989·30 cites·38 claims
- 1066US5152032AWindow sash balance with tension and torsion springCALDWELL MFG CO·Filed 1991·Granted Oct 6, 1992·30 cites·18 claims
- 1164US5119592ABalance system for laterally biased sash guidesCALDWELL MFG CO·Filed 1990·Granted Jun 9, 1992·29 cites·12 claims
- 1263US4837976AWindow balance spring cover friction systemCALDWELL MFG CO·Filed 1988·Granted Jun 13, 1989·21 cites·17 claims
- 1355US5207025AAutomatic friction shoeCALDWELL MFG CO·Filed 1992·Granted May 4, 1993·21 cites·31 claims
- 1454US4779380ASpring cover friction system for sash balanceCALDWELL MFG CO·Filed 1987·Granted Oct 25, 1988·16 cites·18 claims
- 1552US5231795ALock shoe system for heavy sashCALDWELL MFG CO·Filed 1992·Granted Aug 3, 1993·19 cites·25 claims
- 1650US5199219AWindow jamb linerCALDWELL MFG CO·Filed 1991·Granted Apr 6, 1993·20 cites·14 claims
- 1750US4800680ACord guide system for sash balanceCALDWELL MFG CO·Filed 1987·Granted Jan 31, 1989·18 cites·24 claims
- 1846US4275767AFluid resistorSYBRON CORP·Filed 1976·Granted Jun 30, 1981·12 cites·11 claims
- 1939US5551189AHurricane window braceCALDWELL MFG CO·Filed 1994·Granted Sep 3, 1996·11 cites·18 claims
- 2035US5159794AJamb liner slot coverCALDWELL MFG CO·Filed 1991·Granted Nov 3, 1992·9 cites·19 claims
- 2126US4811455AWindow spring anchorCALDWELL MFG CO·Filed 1988·Granted Mar 14, 1989·6 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →