Inventor
Roderick B. Hogan
Inventor
San Francisco, CA, US
Overview
Patents· 23 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers36%
H03FAmplifiers14%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems10%
G09GArrangements or circuits for control of indicating devices using static means to present variable information5%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h105%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h105%
G01DMeasuring not specially adapted for a specific variable2%
G01KMeasuring temperature2%
G01RMeasuring electric variables2%
G01SRadio direction-finding2%
PatentTitleYear
10,963,410Data bus driver with electrical energy dump202110,917,050Amplifier power converter input current/power limit adjustment using amplifier load determinations202110,911,009Current-source switching hybrid audio amplifier202110,674,280High output impedance audio amplifier for noise rejection202010,666,209Increased output impedance switching amplifier and low-side recycle mode202010,283,989Electrical power converter and detachable energy storage reservoir201910,254,134Interference-insensitive capacitive displacement sensing201910,212,500Digital transducer circuit201910,149,078Capacitive sensing of a moving-coil structure with an inset plate20189,967,664Sensor assembly for measuring diaphragm displacement and temperature in a micro speaker20189,854,355Grounding circuit for alternate audio plug designs20179,847,713Charge pump-based split-rail supply generation20179,826,308'Capacitive displacement sensing circuit with a guard voltage source'20179,793,658'Reuse of plug detection contacts to reduce crosstalk'20179,729,964'Audio apparatus having dynamic ground break resistance'20179,681,228'Capacitive position sensing for transducers'20179,332,343'Multi-channel audio system having a shared current sense element for estimating individual speaker impedances using test signals'20169,247,345'Multi-channel audio system having a shared current sense element for estimating individual speaker impedances'20169,231,543'Audio power amplification with reduced input power supply crest factor'20168,921,158'Semiconductor device having mode of operation defined by inner bump assembly connection'20148,575,755'Semiconductor device having mode of operation defined by inner bump assembly connection'20137,126,596'Rail-to-rail amplifier for use in line-inversion LCD grayscale reference generator'20066,750,839'Grayscale reference generator'2004Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2004–2006Patents assigned to ANALOG DEVICES INC (2)· patent assignee history
2004Based in Sunnyvale, CA, US· patent location history
2006–2021Based in San Francisco, CA, US· patent location history
2013–2014Patents assigned to MAXIM INTEGRATED PRODUCTS (2)· patent assignee history
2013Patents assigned to CHAMAKURA ANAND K (1)· patent assignee history
2013Patents assigned to CHRISTMAN KYMBERLY TENNILLE (1)· patent assignee history
2016–2021Patents assigned to APPLE INC (19)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| APPLE INC | 19 | 2016–2021 |
| ANALOG DEVICES INC | 2 | 2004–2006 |
| MAXIM INTEGRATED PRODUCTS | 2 | 2013–2014 |
| CHAMAKURA ANAND K | 1 | 2013 |
| CHRISTMAN KYMBERLY TENNILLE | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| San Francisco, California, US | 22 | 2006–2021 |
| Sunnyvale, California, US | 1 | 2004 |