RU

Richard Donald Umphress

IBM: 5 patents #18,733 of 70,183Top 30%
🗺 California: #106,790 of 386,348 inventorsTop 30%
Overall (All Time): #1,047,715 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
6010601 Method of making magnetic disk with boron carbide overcoat layer and adhesion layer Richard H. Ahlert, James K. Howard, Muhammad Inayet Ullah 2000-01-04
5897931 Magnetic disk with boron carbide overcoat layer Richard H. Ahlert, James K. Howard, Muhammad Inayet Ullah 1999-04-27
5750231 Magnetic disk with boron carbide overcoat layer Richard H. Ahlert, James K. Howard, Muhammad Inayet Ullah 1998-05-12
5629682 Magnetic recorder having MR read and inductive write capability Todd Hylton 1997-05-13
5552204 Magnetic disk with boron carbide overcoat layer Richard H. Ahlert, James K. Howard, Muhammad Inayet Ullah 1996-09-03