Inventor
Helmut Keller
Inventor
Darmstadt, DE
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A61Kprimary
A61KPreparations for medical, dental or toiletry purposes18%
A61QSpecific use of cosmetics or similar toiletry preparations11%
G01RMeasuring electric variables11%
H03MCoding7%
H10DInorganic electric semiconductor devices7%
B41JTypewriters4%
B60KArrangement or mounting of propulsion units or of transmissions in vehicles4%
B60TVehicle brake control systems or parts thereof4%
B60WConjoint control of vehicle sub-units of different type or different function4%
B62DMotor vehicles4%
PatentTitleYear
7,089,101'Method for assisting a driver when performing driving maneuvers'20065,955,954'Warning and measuring device for personal protection in electromagnetic fields'19995,935,562'Permanent process and agent'19995,877,619'Battery-operated hand field-strength meter and method of null balancing same'19995,865,856'2, 5-diaminobenzonitrile compounds and oxidation hair dye compositions containing same'19995,859,532'Method of and measuring arrangement for metal detection with a coil device having several separately controllable regions'19995,675,335'Method of improving the distortion behavior of analog-to-digital converters'19975,409,503'Oxidation hair dye with a content of 5-aminophenyl derivatives, process for oxidative dyeing of hair and new 5-aminophenol derivatives'19954,957,743'Method for treating herpes'19904,889,716'Method for treating herpes and chronic inflammatory intestinal tract disease'19894,141,660'Printer for data-processing machine having single operator station'19794,054,828'Cyclically operating transistorized power switching circuit system'19773,987,392'Luminescent voltage indicator circuit'19763,930,304'Method and apparatus for selective burnout trimming of integrated circuit units'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1977Patents assigned to BOSCH GMBH ROBERT (3)· patent assignee history
1976–1977Based in Reutlingen, DE· patent location history
1989–1990Patents assigned to KELLER HELMUT (2)· patent assignee history
1989–1990Based in Nordhalben, DE· patent location history
1995–1999Patents assigned to WELLA AG (3)· patent assignee history
1995–1999Based in Darmstadt, DE· patent location history
1997–1999Based in Pfullingen, DE· patent location history
1999Patents assigned to WANDEL & GOLTERMANN MANAGEMENT (2)· patent assignee history
2006Patents assigned to DAIMLER CHRYSLER AG (1)· patent assignee history
2006Based in Korb, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BOSCH GMBH ROBERT | 3 | 1976–1977 |
| WELLA AG | 3 | 1995–1999 |
| KELLER HELMUTself | 2 | 1989–1990 |
| WANDEL & GOLTERMANN MANAGEMENT | 2 | 1999 |
| DAIMLER CHRYSLER AG | 1 | 2006 |
Locations
| Location | Patents | Span |
|---|---|---|
| Darmstadt, DE | 3 | 1995–1999 |
| Reutlingen, DE | 3 | 1976–1977 |
| Pfullingen, DE | 2 | 1997–1999 |
| Nordhalben, DE | 2 | 1989–1990 |
| Korb, DE | 1 | 2006 |