Inventor
David M. Johns
Inventor
Lakeside, CA, US
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G06Fprimary
G06FElectric digital data processing12%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light12%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems12%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications12%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices8%
H04LTransmission of digital information, e.g. telegraphic communication8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry4%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds4%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light4%
PatentTitleYear
8,473,606'Network monitoring system'20138,467,208'Input voltage-independent active power control of DC to AC power converters'20137,859,872'Load voltage-independent active power control of power converters'20107,490,066'Method, apparatus, and article of manufacture for a network monitoring system'20097,442,915'Signal conditioning circuitry'20087,209,373'High voltage pulse generator'20076,882,674'Four KHz gas discharge laser system'20056,757,316'Four KHz gas discharge laser'20046,327,286'High speed magnetic modulator voltage and temperature timing compensation circuit'20015,959,045'Process for preparing polyketones'1999Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1999Patents assigned to BP CHEM INT LTD (1)· patent assignee history
2001–2005Patents assigned to CYMER INC (3)· patent assignee history
2001–2005Based in Lakeside, CA, US· patent location history
2007–2010Patents assigned to KAISER SYSTEMS INC (2)· patent assignee history
2007–2010Based in Groveland, MA, US· patent location history
2008Patents assigned to ADVANCED INPUT DEVICES UK LTD (1)· patent assignee history
2008Based in Ringwood, GB· patent location history
2009–2013Based in Southfield, MI, US· patent location history
2013Patents assigned to COGNATA MATT (1)· patent assignee history
2013Based in Groveleand, MA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CYMER INC | 3 | 2001–2005 |
| KAISER SYSTEMS INC | 2 | 2007–2010 |
| ADVANCED INPUT DEVICES UK LTD | 1 | 2008 |
| BP CHEM INT LTD | 1 | 1999 |
| COGNATA MATT | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Lakeside, California, US | 3 | 2001–2005 |
| Southfield, MI, US | 2 | 2009–2013 |
| Groveland, Massachusetts, US | 2 | 2007–2010 |
| Groveleand, Massachusetts, US | 1 | 2013 |
| Ringwood, GB | 1 | 2008 |