Inventor
Robert A. Erhardt
Inventor
Schaumburg, IL, US
Overview
Patents· 16 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H05Bprimary
H05BElectric heating53%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests23%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications13%
G09GArrangements or circuits for control of indicating devices using static means to present variable information3%
H01GCapacitors3%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h103%
PatentTitleYear
9,035,571'Electronic ballast with dimming circuit'20157,830,095'LED assembly and module'20106,853,150'Light emitting diode driver'20056,853,154'Open loop bi-level ballast control'20056,713,973'System and method of automatic cycling control for HID lamps'20046,686,703'High frequency electronic ballast'20046,583,588'System and method of automatic cycling control for HID lamps'20036,507,157'Electronic ballast system with dual power and dimming capability'20036,489,729'Auxiliary lighting system for high intensity discharge lamp'20026,373,199'Reducing stress on ignitor circuitry for gaseous discharge lamps'20026,204,614'Bi-level output electronic high intensity discharge (HID) ballast system'20015,563,473'Electronic ballast for operating lamps in parallel'19965,187,414'Fluorescent lamp controllers'19935,111,118'Fluorescent lamp controllers'19925,032,767'High frequency oscillator-inverter with improved regenerative power supply'19914,952,848'Signal generating circuit for ballast control of discharge lamps'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–1993Patents assigned to PHILIPS CORP (4)· patent assignee history
1990–1993Based in Chicago, IL, US· patent location history
1996–2002Patents assigned to PHILIPS ELECTRONICS NA (3)· patent assignee history
1996Based in Torrance, CA, US· patent location history
2001–2015Based in Schaumburg, IL, US· patent location history
2002–2010Patents assigned to KONINKL PHILIPS ELECTRONICS NV (8)· patent assignee history
2015Patents assigned to BADDELA SRINIVASA (1)· patent assignee history
2015Patents assigned to ERHARDT ROBERT A (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| KONINKL PHILIPS ELECTRONICS NV | 8 | 2002–2010 |
| PHILIPS CORP | 4 | 1990–1993 |
| PHILIPS ELECTRONICS NA | 3 | 1996–2002 |
| BADDELA SRINIVASA | 1 | 2015 |
| ERHARDT ROBERT Aself | 1 | 2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Schaumburg, Illinois, US | 11 | 2001–2015 |
| Chicago, Illinois, US | 4 | 1990–1993 |
| Torrance, California, US | 1 | 1996 |