Inventor
Frank E. Wills
Inventor
York, PA, US
Overview
Patents· 22 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters30%
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 systems20%
F25BRefrigeration machines, plants or systems15%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications10%
G05DSystems for controlling or regulating non-electric variables8%
F25DRefrigerators5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids3%
G01RMeasuring electric variables3%
H03KPulse technique3%
PatentTitleYear
7,096,681'System and method for variable speed operation of a screw compressor'20067,075,268'System and method for increasing output horsepower and efficiency in a motor'20066,121,749'Variable-speed drive for single-phase motors'20005,898,554'Switch driver circuit'19995,838,144'Solid state, reduced voltage motor starter enabling equalized input/output volt-amp ratings'19985,555,736'Refrigeration system and method'19965,460,009'Refrigeration system and method'19955,252,905'Driving system for single phase A-C induction motor'19935,218,283'AC motor drive system with a two phase power supply'19935,146,147'AC motor drive system'19925,136,216'AC motor drive system'19925,075,838'Energy efficient voltage snubber circuit'19914,864,487'Control for three terminal power semiconductor devices'19894,706,180'Pulse width modulated inverter system for driving single phase a-c induction motor'19874,651,079'Pulse width modulated inverter system for driving single phase a-c induction motor at a constant voltage/frequency ratio'19874,499,534'Control system for controlling an SCR network to regulate three-phase A-C power flow'19854,425,539'Control system for AC induction motor'19844,146,920'Pre-charge circuit for aux-comm inverter'19794,146,085'Diagnostic system for heat pump'19794,102,389'Heat pump control system'19784,078,393'Control system for controlling the operation of a three-phase load'19784,075,865'Apparatus for controlling condenser pressure in a refrigeration system'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1985Patents assigned to BORG WARNER (7)· patent assignee history
1978–2006Based in York, PA, US· patent location history
1987–2006Patents assigned to YORK INT CORP (13)· patent assignee history
1987Patents assigned to WILLS FRANK E (1)· patent assignee history
2000Patents assigned to WORK SMART ENERGY ENTPR INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| YORK INT CORP | 13 | 1987–2006 |
| BORG WARNER | 7 | 1978–1985 |
| WILLS FRANK Eself | 1 | 1987 |
| WORK SMART ENERGY ENTPR INC | 1 | 2000 |
Locations
| Location | Patents | Span |
|---|---|---|
| York, Pennsylvania, US | 22 | 1978–2006 |