Inventor
David M. Walker
Inventor
Westford, MA, US
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Jprimary
H01JElectric discharge tubes or discharge lamps28%
B82YSpecific uses or applications of nanostructures11%
A47JKitchen equipment6%
C02FTreatment of water, waste water, sewage, or sludge6%
F02PIgnition, other than compression ignition, for internal-combustion engines6%
G01RMeasuring electric variables6%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices6%
G06FElectric digital data processing6%
H01TSpark gaps6%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h106%
PatentTitleYear
8,680,758'Spark plug having a plastic upper insulator and method of construction'20146,775,646'Excitation signal and radial basis function methods for use in extraction of nonlinear black-box behavioral models'20046,145,542'Water treatment apparatus for scale prevention'20005,678,734'Instant hot water dispenser'19974,667,108'Impedance matched and thermally cooled deflection amplifiers for charged particle beam apparatus employing deflectors'19874,665,315'Method and apparatus for in-situ plasma cleaning of electron beam optical systems'19874,661,203'Low defect etching of patterns using plasma-stencil mask'19874,661,709'Modular all-electrostatic electron-optical column and assembly of said columns into an array and method of manufacture'19874,419,580'Electron beam array alignment means'19834,262,644'Spark timing control circuit for controlling the timing of spark ignition of an internal combustion engine'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1983–1987Patents assigned to CONTROL DATA CORP (5)· patent assignee history
1983–1987Based in Westford, MA, US· patent location history
1997Based in Leicester, GB· patent location history
2000Based in Huddersfield, GB· patent location history
2004Patents assigned to AGILENT TECHNOLOGIES INC (1)· patent assignee history
2004Based in Cottesloe, WA, US· patent location history
2014Patents assigned to BOLDUC BRIAN A (1)· patent assignee history
2014Patents assigned to FEDERAL MOGUL IGNITION CO (1)· patent assignee history
2014Patents assigned to HOFFMAN JOHN W (1)· patent assignee history
2014Based in Waukesha, WI, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CONTROL DATA CORP | 5 | 1983–1987 |
| AGILENT TECHNOLOGIES INC | 1 | 2004 |
| BOLDUC BRIAN A | 1 | 2014 |
| FEDERAL MOGUL IGNITION CO | 1 | 2014 |
| HOFFMAN JOHN W | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Westford, Massachusetts, US | 5 | 1983–1987 |
| Waukesha, WI, US | 1 | 2014 |
| Cottesloe, Washington, US | 1 | 2004 |
| Huddersfield, GB | 1 | 2000 |
| Leicester, GB | 1 | 1997 |