Inventor · disambiguated record
Hartmut Grethen
Also filed as: GRETHEN HARTMUT
5 granted patents·52 citations·filing 1985–1991
79Inventor score
Top patents by PatentIndex Score
5 records- 0161US4743410AMethod for manufacturing a flat illumination unitSIEMENS AG·Filed 1986·Granted May 10, 1988·21 cites·21 claims
- 0246US4778989AScanning device for microline-by-microline illumination and optically scanning a planar originalSIEMENS AG·Filed 1985·Granted Oct 18, 1988·12 cites·44 claims
- 0343US5365348AProcess for printing a halftone imageMANNESMANN AG·Filed 1991·Granted Nov 15, 1994·10 cites·5 claims
- 0432US5158929AInking ribbonMANNESMANN AG·Filed 1988·Granted Oct 27, 1992·2 cites·10 claims
- 0531US4756633AInking ribbon including a sublimable release layer for color transfer under the influence of heatDREES FRIEDRICH WILHELM·Filed 1987·Granted Jul 12, 1988·7 cites·8 claims
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