Inventor
Douglas G. Marsh
Inventor
Bethlehem, PA, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G05Fprimary
G05FSystems for regulating electric or magnetic variables22%
H03FAmplifiers22%
H03KPulse technique22%
H03MCoding11%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers11%
H10DInorganic electric semiconductor devices11%
PatentTitleYear
7,317,234'Means of integrating a microphone in a standard integrated circuit process'20086,864,741'Low noise resistorless band gap reference'20056,831,498'High speed integrated circuit current switch'20046,018,272'Linearization of resistance'20005,936,391'Partially temperature compensated low noise voltage reference'19995,596,322'Reducing the number of trim links needed on multi-channel analog integrated circuits'19974,677,323'Field-effect transistor current switching circuit'19874,322,687'Operational amplifier with improved offset correction'19824,306,196'Operational amplifier with offset compensation'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981–1982Patents assigned to BELL TELEPHONE LABOR INC (2)· patent assignee history
1981–1987Based in Freehold, NJ, US· patent location history
1982Based in Howell Township, Monmouth County, NJ, US· patent location history
1987Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (1)· patent assignee history
1997–2000Patents assigned to LUCENT TECHNOLOGIES INC (3)· patent assignee history
1997–2008Based in Bethlehem, PA, US· patent location history
2008Patents assigned to GANESAN APPARAJAN (1)· patent assignee history
2008Patents assigned to MARSH DOUGLAS G (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LUCENT TECHNOLOGIES INC | 3 | 1997–2000 |
| BELL TELEPHONE LABOR INC | 2 | 1981–1982 |
| AMERICAN TELEPHONE & TELEGRAPH | 1 | 1987 |
| GANESAN APPARAJAN | 1 | 2008 |
| MARSH DOUGLAS Gself | 1 | 2008 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bethlehem, Pennsylvania, US | 6 | 1997–2008 |
| Freehold, New Jersey, US | 2 | 1981–1987 |
| Howell Township, Monmouth County, New Jersey, US | 1 | 1982 |