Inventor
Joseph G. Walsh
Inventor
Cambridge, MA, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Fprimary
H01FMagnets23%
G01CMeasuring distances, levels or bearings15%
Y10TTechnical subjects covered by former us classification15%
G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves8%
G01PMeasuring linear or angular speed, acceleration, deceleration, or shock8%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices8%
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 systems8%
H03FAmplifiers8%
H10DInorganic electric semiconductor devices8%
PatentTitleYear
7,106,039'Closed loop direct current to direct current converter that does not require voltage reference'20066,990,725'Fabrication approaches for the formation of planar inductors and transformers'20066,844,781'Dual differential-input amplifier having wide input range'20056,683,522'Planar miniature inductors and transformers'20046,446,217'System for determining and controlling the peak amplitude and phase of an oscillating member'20026,233,834'Miniature transformers for millimachined instruments'20015,363,195'Automatic gain calibration system for a phase modulator in a fiber optic gyro'19944,853,315'O-quinone diazide sulfonic acid monoesters useful as sensitizers for positive resists'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989Based in Oakland, CA, US· patent location history
1994Patents assigned to DRAPER LAB CHARLES S (1)· patent assignee history
1994–2002Based in Cambridge, MA, US· patent location history
2001–2004Patents assigned to MILLI SENSOR SYSTEMS & ACTUATO (3)· patent assignee history
2004–2006Based in Brookline, MA, US· patent location history
2005–2006Patents assigned to AMI SEMICONDUCTOR INC (2)· patent assignee history
2005–2006Based in Pocatello, ID, US· patent location history
2006Patents assigned to CARDARELLI DONATO (1)· patent assignee history
2006Patents assigned to FONTANELLA MARK D (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MILLI SENSOR SYSTEMS & ACTUATO | 3 | 2001–2004 |
| AMI SEMICONDUCTOR INC | 2 | 2005–2006 |
| CARDARELLI DONATO | 1 | 2006 |
| DRAPER LAB CHARLES S | 1 | 1994 |
| FONTANELLA MARK D | 1 | 2006 |
Locations
| Location | Patents | Span |
|---|---|---|
| Cambridge, Massachusetts, US | 3 | 1994–2002 |
| Pocatello, ID, US | 2 | 2005–2006 |
| Brookline, Massachusetts, US | 2 | 2004–2006 |
| Oakland, California, US | 1 | 1989 |