Inventor · disambiguated record
Robert J. Pragnell
Also filed as: PRAGNELL ROBERT J · PRAGNELL ROBERT JAMES
4 granted patents·87 citations·filing 1975–1984
78Inventor score
Files withCOAL INDUSTRY PATENTS LTD4
Top patents by PatentIndex Score
4 records- 0175US4670071AMethod of forming a waterproof roofCOAL INDUSTRY PATENTS LTD·Filed 1984·Granted Jun 2, 1987·52 cites·7 claims
- 0263US4010123ACellular materialCOAL INDUSTRY PATENTS LTD·Filed 1975·Granted Mar 1, 1977·17 cites·10 claims
- 0346US4233357ALaminated insulating boardCOAL INDUSTRY PATENTS LTD·Filed 1979·Granted Nov 11, 1980·9 cites·5 claims
- 0446US4045380ACellular materialCOAL INDUSTRY PATENTS LTD·Filed 1975·Granted Aug 30, 1977·9 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →