Inventor
David E. Blackmer
Inventor
Wilton, NH, US
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H03Gprimary
H03GControl of amplification36%
H04SStereophonic systems20%
H04BTransmission12%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers12%
H03FAmplifiers8%
G06GAnalogue computers4%
G11BInformation storage based on relative movement between record carrier and transducer4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
PatentTitleYear
6,526,149'System and method for reducing non linear electrical distortion in an electroacoustic device'20036,091,829'Microphone apparatus'20004,706,287'Stereo generator'19874,680,796'Sound encoding system'19874,589,129'Signal decoding system'19864,473,793'Bias generator'19844,425,551'Differential amplifier stage having bias compensating means'19844,404,427'Audio signal processing system'19834,403,199'Gain control systems'19834,377,792'Compander system'19834,220,929'Signal expander'19804,182,930'Detection and monitoring device'19804,136,314'Adaptive signal weighting system'19794,124,784'Motion picture sound system'19784,112,254'Signal compander system'19784,101,849'Adaptive filter'19784,097,767'Operational rectifier'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1984Patents assigned to DBX (11)· patent assignee history
1978–2003Based in Wilton, NH, US· patent location history
1983–1987Patents assigned to KINTEK INC (4)· patent assignee history
2000–2003Patents assigned to EARTHWORKS INC (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DBX | 11 | 1978–1984 |
| KINTEK INC | 4 | 1983–1987 |
| EARTHWORKS INC | 2 | 2000–2003 |
Locations
| Location | Patents | Span |
|---|---|---|
| Wilton, NH, US | 17 | 1978–2003 |