Inventor
Stefan Spannhake
Inventor
Berlin, DE
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B66Bprimary
B66BElevators30%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters15%
B60KArrangement or mounting of propulsion units or of transmissions in vehicles5%
B60LPropulsion of electrically-propelled vehicles5%
B60WConjoint control of vehicle sub-units of different type or different function5%
E05BLocks5%
G01SRadio direction-finding5%
G05DSystems for controlling or regulating non-electric variables5%
H01FMagnets5%
H02HEmergency protective circuit arrangements5%
PatentTitleYear
9,531,304'Method and device for operating an electrical machine having separate excitation'20169,059,584'Circuit arrangement for limiting the overvoltage of an excitation winding of a synchronous machine having rapid de-excitation'20157,650,954'Method for controlling the drive power distribution in a motor vehicle with hybrid drive'20106,782,989'Process for switching between mains supply and a frequency inverter and vice versa'20046,634,463'Switch over from the mains supply to a frequency converter by a phase correction process for an escalator drive'20036,626,279'Process for switching between main supply and a frequency inverter and vice versa for an escalator drive'20036,591,947'Use of multi-state sensors'20036,267,219'Electronic safety system for escalators'20015,883,345'Sonic position measurement system'1999Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1999–2004Patents assigned to OTIS ELEVATOR CO (5)· patent assignee history
1999–2004Based in Berlin, DE· patent location history
2010Based in Vaihingen, DE· patent location history
2015–2016Patents assigned to BOSCH GMBH ROBERT (2)· patent assignee history
2015–2016Patents assigned to SPANNHAKE STEFAN (2)· patent assignee history
2015–2016Based in Markgroeningen, DE· patent location history
2016Patents assigned to BEYER MARIO (1)· patent assignee history
2016Patents assigned to CHALLAND YVES (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| OTIS ELEVATOR CO | 5 | 1999–2004 |
| BOSCH GMBH ROBERT | 2 | 2015–2016 |
| SPANNHAKE STEFANself | 2 | 2015–2016 |
| BEYER MARIO | 1 | 2016 |
| CHALLAND YVES | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Berlin, DE | 6 | 1999–2004 |
| Markgroeningen, DE | 2 | 2015–2016 |
| Vaihingen, DE | 1 | 2010 |