Inventor · disambiguated record
Richard Donald Umphress
Also filed as: UMPHRESS RICHARD D · UMPHRESS RICHARD DONALD
5 granted patents·31 citations·filing 1994–1997
80Inventor score
Files withIBM5
Top patents by PatentIndex Score
5 records- 0159US5897931AMagnetic disk with boron carbide overcoat layerIBM·Filed 1996·Granted Apr 27, 1999·10 cites·9 claims
- 0254US5552204AMagnetic disk with boron carbide overcoat layerIBM·Filed 1995·Granted Sep 3, 1996·8 cites·7 claims
- 0343US5750231AMagnetic disk with boron carbide overcoat layerIBM·Filed 1996·Granted May 12, 1998·4 cites·26 claims
- 0440US6010601AMethod of making magnetic disk with boron carbide overcoat layer and adhesion layerIBM·Filed 1997·Granted Jan 4, 2000·3 cites·38 claims
- 0536US5629682AMagnetic recorder having MR read and inductive write capabilityIBM·Filed 1994·Granted May 13, 1997·6 cites·33 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →