Inventor
Joel D. Birkeland
Inventor
North Plains, OR, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H03Hprimary
H03HImpedance networks, e.g. resonant circuits36%
H03FAmplifiers27%
H03DDemodulation or transference of modulation from one carrier to another18%
H03JTuning resonant circuits9%
H04NPictorial communication, e.g. television9%
PatentTitleYear
9,231,538'Energy efficient, low distortion amplification apparatus'20168,878,588'Low distortion MOS attenuator'20148,736,344'Voltage controlled variable attenuator'20148,686,780'Low distortion MOS attenuator'20148,390,359'Low distortion MOS attenuator'20137,095,454'Broadband single conversion tuner integrated circuits'20065,994,955'Driver amplifiers with low noise standby mode characteristics'19995,506,544'Bias circuit for depletion mode field effect transistors'19965,325,000'Frequency mixing circuit with impedance transforming power combiner'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–1996Patents assigned to MOTOROLA INC (2)· patent assignee history
1994Based in Phoenix, AZ, US· patent location history
1996Based in Gilbert, AZ, US· patent location history
1999–2016Patents assigned to MAXIM INTEGRATED PRODUCTS (7)· patent assignee history
1999Based in Hillsboro, OR, US· patent location history
2006–2016Based in North Plains, OR, US· patent location history
2013–2014Patents assigned to BIRKELAND JOEL D (3)· patent assignee history
2013–2014Patents assigned to MEYER ROBERT G (3)· patent assignee history
2016Patents assigned to MAXIM INTERGRATED PRODUCTS INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MAXIM INTEGRATED PRODUCTS | 7 | 1999–2016 |
| BIRKELAND JOEL Dself | 3 | 2013–2014 |
| MEYER ROBERT G | 3 | 2013–2014 |
| MOTOROLA INC | 2 | 1994–1996 |
| MAXIM INTERGRATED PRODUCTS INC | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| North Plains, OR, US | 6 | 2006–2016 |
| Hillsboro, OR, US | 1 | 1999 |
| Gilbert, AZ, US | 1 | 1996 |
| Phoenix, AZ, US | 1 | 1994 |