Inventor
Wolfram Sowa
Inventor
Munich, DE
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H05Bprimary
H05BElectric heating50%
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 systems22%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
8,587,210'Electronic ballast for operating at least one discharge lamp'20138,390,209'Circuit arrangement for conversion of an input AC voltage to a DC voltage, retrofit lamp having a circuit arrangement such as this, as well as a lighting system'20138,054,003'Switch-off time regulation system for an inverter for driving a lamp'20117,564,673'Control circuit for converters'20097,394,207'Circuit arrangement having a full bridge with switching load relief for operating lamps'20087,274,578'Converter circuit having class E converter modules'20076,768,271'Ballast and method for operating a lamp'20046,747,418'Device and method for preheating the coil electrodes of a fluorescent lamp'20045,493,182'Fluorescent lamp operating circuit, permitting dimming of the lamp'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–2007Patents assigned to PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH (4)· patent assignee history
1996–2013Based in Munich, DE· patent location history
2008–2011Based in München, DE· patent location history
2009–2013Patents assigned to OSRAM GMBH (2)· patent assignee history
2011–2013Patents assigned to OSRAM AG (2)· patent assignee history
2013Patents assigned to SOWA WOLFRAM (2)· patent assignee history
2013Patents assigned to DELLIAN HARALD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH | 4 | 1996–2007 |
| OSRAM AG | 2 | 2011–2013 |
| OSRAM GMBH | 2 | 2009–2013 |
| SOWA WOLFRAMself | 2 | 2013 |
| DELLIAN HARALD | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Munich, DE | 7 | 1996–2013 |
| München, DE | 2 | 2008–2011 |