Inventor
Holger Freitag
Inventor
Bochum, DE
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B66Cprimary
B66CCranes24%
B66DCapstans24%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters10%
B25JManipulators5%
G01BMeasuring length, thickness or similar linear dimensions5%
G01DMeasuring not specially adapted for a specific variable5%
G01PMeasuring linear or angular speed, acceleration, deceleration, or shock5%
G05BControl or regulating systems in general5%
H01HElectric switches5%
H02HEmergency protective circuit arrangements5%
PatentTitleYear
D0875690Control switch202010,202,264Cable winch20199,643,322'Control method for a balancing lifting gear and balancing lifting gear'20179,385,523'Circuit arrangement having an emergency stop switch of a hoist'20167,504,602'Suspended control device'20097,497,303'Method for setting the parameters of motor control systems of hoisting equipment'20097,422,542'Method of monitoring a chain pulley block and chain pulley block apparatus'20087,126,307'Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith'20067,068,009'Drive arrangement, especially for a lifting mechanism and/or a traveling drive'20066,972,385'Operating device for manual actuation of hoisting equipment'20055,818,185'Process and device for monitoring and controlling the speed of rotation of an electric drive with frequency converter for hoisting gears'19985,813,124'Angle measuring device'19985,632,469'Electric hoist with speed control, a protective housing and a swivelable circuit board in the housing'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–1998Patents assigned to MANNESMANN AG (3)· patent assignee history
1997–2020Based in Bochum, DE· patent location history
2005–2017Patents assigned to DEMAG CRANES & COMPONENTS GMBH (7)· patent assignee history
2016Patents assigned to FREITAG HOLGER (1)· patent assignee history
2016Patents assigned to MACCIONI GIORGIO (1)· patent assignee history
2019–2020Patents assigned to KONECRANES GLOBAL CORP (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DEMAG CRANES & COMPONENTS GMBH | 7 | 2005–2017 |
| MANNESMANN AG | 3 | 1997–1998 |
| KONECRANES GLOBAL CORP | 2 | 2019–2020 |
| FREITAG HOLGERself | 1 | 2016 |
| MACCIONI GIORGIO | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bochum, DE | 13 | 1997–2020 |