Inventor
Robert D. Hempstead
Inventor
Los Gatos, CA, US
Overview
Patents· 15 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer52%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%
H01FMagnets8%
Y10TTechnical subjects covered by former us classification8%
B82YSpecific uses or applications of nanostructures4%
C23CCoating metallic material4%
H01JElectric discharge tubes or discharge lamps4%
H10NElectric solid-state devices not otherwise provided for4%
PatentTitleYear
8,919,279'Processing system having magnet keeper'20147,541,105'Epitaxial ferroelectric and magnetic recording structures including graded lattice matching layers'20097,095,585'Hard disk drive for perpendicular recording with transducer having submicron gap between pole tips'20066,671,235'Method of and apparatus for defining disk tracks in magnetic recording media'20036,535,361'Contact planar magnetoresistive head'20036,493,191'Planar magnetic ring head for contact recording with a rigid disk'20026,320,725'Hard disk drive having ring head with predominantly perpendicular media fields'20016,212,047'Hard disk drive with magnetoresistive head and perpendicular media'20016,198,607'Contact planar magnetoresistive head'20015,949,612'Low friction sliding hard disk drive system'19994,242,710'Thin film head having negative magnetostriction'19804,130,847'Corrosion resistant thin film head assembly and method for making'19784,103,315'Antiferromagnetic-ferromagnetic exchange bias films'19784,049,522'Low coercivity iron-silicon material, shields, and process'19774,024,489'Magnetoresistive sandwich including sensor electrically parallel with electrical shunt and magnetic biasing layers'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1980Patents assigned to IBM (5)· patent assignee history
1977Based in Yorktown Heights, NY, US· patent location history
1978–1980Based in Morgan Hill, CA, US· patent location history
1999–2003Patents assigned to CENSTOR CORP (6)· patent assignee history
1999–2014Based in Los Gatos, CA, US· patent location history
2006–2009Patents assigned to SEAGATE TECHNOLOGY LLC (2)· patent assignee history
2009Based in Pittsburgh, PA, US· patent location history
2014Patents assigned to BOUREZ ALLEN J (1)· patent assignee history
2014Patents assigned to CHEN JINLIANG (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CENSTOR CORP | 6 | 1999–2003 |
| IBM | 5 | 1977–1980 |
| SEAGATE TECHNOLOGY LLC | 2 | 2006–2009 |
| BOUREZ ALLEN J | 1 | 2014 |
| CHEN JINLIANG | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Los Gatos, California, US | 9 | 1999–2014 |
| Morgan Hill, California, US | 3 | 1978–1980 |
| Yorktown Heights, New York, US | 2 | 1977 |
| Pittsburgh, Pennsylvania, US | 1 | 2009 |