Inventor · disambiguated record
Donald L. Norrell
Also filed as: NORRELL DONALD L
4 granted patents·40 citations·filing 1976–1981
75Inventor score
Files withMINNESOTA MINING & MFG4
Top patents by PatentIndex Score
4 records- 0156US4280145ANon-linear, multi-speed, bi-directional facsimile subscan drive controlMINNESOTA MINING & MFG·Filed 1977·Granted Jul 21, 1981·12 cites·6 claims
- 0251US4366509AFacsimile apparatus with multiple scanning and printing elementsMINNESOTA MINING & MFG·Filed 1981·Granted Dec 28, 1982·12 cites·5 claims
- 0346US4370650ATone detection circuitryMINNESOTA MINING & MFG·Filed 1981·Granted Jan 25, 1983·11 cites·6 claims
- 0436US4079297AOpen loop facsimile phasing system and methodMINNESOTA MINING & MFG·Filed 1976·Granted Mar 14, 1978·5 cites·31 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →