Inventor · disambiguated record
Leo M. Sprengers
Also filed as: SPRENGERS LEO M · SPRENGERS LEO MODEST
6 granted patents·39 citations·filing 1974–1987
81Inventor score
Files withPHILIPS CORP6
Top patents by PatentIndex Score
6 records- 0157US4783612ALow-pressure sodium vapor discharge lamp with protective glass layer on electrode lead-throughsPHILIPS CORP·Filed 1984·Granted Nov 8, 1988·9 cites·6 claims
- 0255US4441045ALow-pressure sodium vapor discharge lampPHILIPS CORP·Filed 1983·Granted Apr 3, 1984·8 cites·4 claims
- 0342US3956656ADischarge tube having two internal electrodesPHILIPS CORP·Filed 1974·Granted May 11, 1976·4 cites·9 claims
- 0440US4825128ACompact discharge lamp with conductive coating capacitvely coupled to high frequency supplyPHILIPS CORP·Filed 1987·Granted Apr 25, 1989·5 cites·6 claims
- 0540US4401693AMethod of manufacturing a heat-reflecting filterPHILIPS CORP·Filed 1981·Granted Aug 30, 1983·9 cites·5 claims
- 0628US4636691AArrangement including a metal vapor discharge tube provided with at least two internal electrodesPHILIPS CORP·Filed 1983·Granted Jan 13, 1987·4 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →