Inventor
David John Jennings
Inventor
Santa Cruz, CA, US
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F16Cprimary
F16CShafts30%
G11BInformation storage based on relative movement between record carrier and transducer29%
H02KDynamo-electric machines8%
Y10TTechnical subjects covered by former us classification6%
H04BTransmission5%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material3%
H03FAmplifiers3%
H04LTransmission of digital information, e.g. telegraphic communication3%
B63GOffensive or defensive arrangements on vessels2%
C09KMaterials for miscellaneous applications, not provided for elsewhere2%
PatentTitleYear
11,124,692Methods of using ionic liquid based asphaltene inhibitors202110,892,786Digital predistortion with out-of-band and peak expansion regularization202110,727,880Crest factor reduction in cable communication systems202010,650,864Hard disk drive with cover and cover support202010,320,340Frequency-shaped digital predistortion20199,934,211System and methods for generating derivative websites20187,296,530'Unmanned system for underwater object inspection, identification and/or neutralization'20076,741,420'Hydrodynamic spindle motor with an internally disposed heating element'20046,702,408'Single plate hydrodynamic bearing cartridge'20046,530,143'Apparatus for setting gaps in hydrodynamic bearing'20036,525,440'Thermal compensation spindle for ceramic ball bearings'20036,293,705'Annular gimbal assembly suitable for disc drive spindle bearings and method of making same'20016,239,943'Squeeze film damping for a hard disc drive'20016,119,348'Air gaging for setting gaps in hydrodynamic bearings'20005,993,066'Fluid retention principle for hydrodynamic bearings'19995,977,674'Single plate hydrodynamic bearing with self-balancing fluid level'19995,946,958'Device for manufacturing a groove bearing'19995,930,075'Disc drive spindle motor having hydro bearing with optimized lubricant viscosity'19995,908,247'Sinusoidal grooving pattern for grooved journal bearing'19995,793,129'Low distortion interference fits for spindle motor assembly'19985,710,678'Disc drive with self-pressurizing fluid bearing and shaft-supporting-ball retaining element'19985,697,708'Hydrodynamic bearing with reduced temperature sensitivity'19975,685,647'Single plate hydrodynamic bearing with self-balancing fluid level and fluid circulation'19975,666,716'Low distortion interference fits for spindle motor assembly'19975,653,540'Hydrodynamic bearing assembly with single sided grooved counterplace'19975,533,812'Single plate hydrodynamic bearing with self-balancing fluid level'19965,524,986'Fluid retention principles for hydrodynamic bearings'19965,520,038'Device for manufacturing a groove bearing'19965,487,608'Single plate hydrodynamic bearing with self-balancing fluid level and fluid circulation'19965,457,589'Hub-disc interface reducing hub reloaded disc surface curvature'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–1999Patents assigned to SEAGATE TECHNOLOGY (16)· patent assignee history
1996–2004Based in Santa Cruz, CA, US· patent location history
2000–2020Patents assigned to SEAGATE TECHNOLOGY LLC (8)· patent assignee history
2001–2020Based in Edina, MN, US· patent location history
2018Based in San Francisco, CA, US· patent location history
2019Patents assigned to ANALOG DEVICES GLOBAL UNLIMITED CO (1)· patent assignee history
2019–2021Based in Bristol, GB· patent location history
2020–2021Patents assigned to ANALOG DEVICES INTERNATIONAL UNLIMITED CO (2)· patent assignee history
2021Patents assigned to BAKER HUGHES HOLDINGS LLC (1)· patent assignee history
2021Based in Houston, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SEAGATE TECHNOLOGY | 16 | 1995–1999 |
| SEAGATE TECHNOLOGY LLC | 8 | 2000–2020 |
| ANALOG DEVICES INTERNATIONAL UNLIMITED CO | 2 | 2020–2021 |
| ANALOG DEVICES GLOBAL UNLIMITED CO | 1 | 2019 |
| BAKER HUGHES HOLDINGS LLC | 1 | 2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Santa Cruz, California, US | 19 | 1996–2004 |
| Edina, Minnesota, US | 4 | 2001–2020 |
| Bristol, GB | 3 | 2019–2021 |
| Houston, Texas, US | 1 | 2021 |
| San Francisco, California, US | 1 | 2018 |