Inventor · disambiguated record
Dale T. Tollefson
Also filed as: TOLLEFSON DALE T
7 granted patents·49 citations·filing 1985–1994
83Inventor score
Files withMINNESOTA MINING & MFG7
Top patents by PatentIndex Score
7 records- 0170US4993661ATape cassette with tape leader detection improvementsMINNESOTA MINING & MFG·Filed 1989·Granted Feb 19, 1991·18 cites·32 claims
- 0248US5074451APlastic tape guide for videocassetteMINNESOTA MINING & MFG·Filed 1989·Granted Dec 24, 1991·9 cites·17 claims
- 0343US4745508APlastic supply tape guide for videocassetteMINNESOTA MINING & MFG·Filed 1985·Granted May 17, 1988·10 cites·8 claims
- 0440US4648563ALeaf-spring roller guideMINNESOTA MINING & MFG·Filed 1985·Granted Mar 10, 1987·5 cites·16 claims
- 0534US5332172ATapered reel pressure springMINNESOTA MINING & MFG·Filed 1990·Granted Jul 26, 1994·3 cites·10 claims
- 0634US4813628ASlack limiter for a magnetic tape cassetteMINNESOTA MINING & MFG·Filed 1987·Granted Mar 21, 1989·3 cites·7 claims
- 0729US5484117AReel spring for a thin-walled videocassetteMINNESOTA MINING & MFG·Filed 1994·Granted Jan 16, 1996·1 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →