Inventor
Fei Ma
Inventor
Malden, MA, US
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Mprimary
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 systems17%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications17%
G01NInvestigating or analysing materials by determining their chemical or physical properties6%
C12NMicroorganisms or enzymes4%
G01RMeasuring electric variables4%
H01FMagnets4%
A61KPreparations for medical, dental or toiletry purposes2%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations2%
B24BMachines, devices, or processes for grinding or polishing2%
B24DTools for grinding, buffing or sharpening2%
PatentTitleYear
10,642,170Angle adjustment tool, angle adjustment system for liquid crystal panel and line defect analysis method202010,576,607Method for microbially dressing a super abrasive tool202010,280,425Minicircle DNA recombinant parental plasmid having genetically engineered antibody gene expression cassette, a minicircle DNA having the expression cassette, and applications201910,205,629Method and device for triggering protection switching by signal degrade of link aggregation port20199,796,233'Independent suspension system and crane having same'20179,718,836'Artificial antigen of aflatoxin biosynthetic precursor sterigmatocystin and method for preparing same'20179,360,518'Circuit integrity detection system for detecting the integrity of a sensing wire in electrically heated textiles'20169,092,217'Power management integrated circuit using a flexible script-based configurator and method for power management'20158,870,584'Card connector with buffering member for preventing card from quickly ejecting'20148,272,376'Gas cooker control system'20128,230,730'Comprehensive test bed for vehicle body'20128,044,644'Symmetric sample and hold over-current sensing method and apparatus'20118,030,909'Method and apparatus for switching a synchronous DC/DC converter between a PWM mode of operation and a light-load mode of operation'20116,278,621'Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification'20016,141,224'Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification'20005,986,899'Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification'19995,949,321'Planar transformer'19995,886,881'Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification'19995,781,420'Single ended forward DC-to-DC converter providing enhanced resetting for synchronous rectification'19985,781,093'Planar transformer'19985,636,107'DC-DC converters'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997–1999Patents assigned to INT POWER DEVICES INC (6)· patent assignee history
1997–2001Based in Malden, MA, US· patent location history
2000–2001Patents assigned to INTERNAT POWER DEVICES INC (2)· patent assignee history
2011Patents assigned to TEXAS INSTRUMENTS INC (2)· patent assignee history
2011Based in Lexington, MA, US· patent location history
2012–2015Patents assigned to MA FEI (3)· patent assignee history
2012–2019Based in Guangdong, CN· patent location history
2020Patents assigned to BEIJING BOE DISPLAY TECH CO (1)· patent assignee history
2020Based in Beijing, CN· patent location history
2020Based in Quanzhou, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| INT POWER DEVICES INC | 6 | 1997–1999 |
| MA FEIself | 3 | 2012–2015 |
| INTERNAT POWER DEVICES INC | 2 | 2000–2001 |
| TEXAS INSTRUMENTS INC | 2 | 2011 |
| BEIJING BOE DISPLAY TECH CO | 1 | 2020 |
Locations
| Location | Patents | Span |
|---|---|---|
| Malden, Massachusetts, US | 8 | 1997–2001 |
| Guangdong, CN | 4 | 2012–2019 |
| Lexington, Massachusetts, US | 2 | 2011 |
| Beijing, CN | 1 | 2020 |
| Quanzhou, CN | 1 | 2020 |