Inventor · disambiguated record
Walter Hrastnik
Also filed as: HRASTNIK WALTER · LANG JOHN W JR
4 granted patents·36 citations·filing 1976–1982
72Inventor score
Files withBELL & HOWELL CO4
Top patents by PatentIndex Score
4 records- 0170US4108537ALight valve system for motion picture film printerBELL & HOWELL CO·Filed 1976·Granted Aug 22, 1978·24 cites·22 claims
- 0266US4367039AWet modular film printerBELL & HOWELL CO·Filed 1982·Granted Jan 4, 1983·10 cites·13 claims
- 0338US4154528APhotographic film printerBELL & HOWELL CO·Filed 1978·Granted May 15, 1979·2 cites·29 claims
- 0428US4155646APrinting head assemblyBELL & HOWELL CO·Filed 1977·Granted May 22, 1979·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →