Inventor
Mark Eugene Shepard
Inventor
Roanoke, VA, US
Overview
Patents· 24 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 systems15%
H05KPrinted circuits9%
G05BControl or regulating systems in general8%
G06FElectric digital data processing6%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h106%
Y02PClimate change mitigation technologies in the production or processing of goods6%
Y10TTechnical subjects covered by former us classification6%
B03BSeparating solid materials using liquids or using pneumatic tables or jigs4%
B07CPostal sorting4%
B66BElevators4%
PatentTitleYear
10,356,228Systems, methods, and apparatus for controlling power semiconductor devices201910,236,113System and method for reducing partial discharge in high voltage planar transformers20199,798,318'Online frequency response characterization system and method'20179,671,442'System and method for detecting a grid event'20179,620,278'System and method for reducing partial discharge in high voltage planar transformers'20179,369,035'Power converter and method of operation'20169,184,650'Systems, methods, and apparatus for controlling power semiconductor devices'20159,099,930'Power converter and method of assembling the same'20158,981,762'Apparatus and method for improved current shunt sensing'20158,942,020'Three-level phase leg for a power converter'20158,897,014'Mechanical layout for half-bridge power module that is optimized for low inductance'20148,897,010'High performance liquid cooled heatsink for IGBT modules'20148,423,160'Systems and methods for controlling electronic circuitry with separated controllers'20138,259,479'Methods and systems for operating a two-stage power converter'20128,073,991'Isolated HART interface with programmable data flow'20117,984,118'Persistent configuration in a multiple processor repairable system'20117,680,034'Redundant control systems and methods'20107,324,360'Power converter methods and apparatus for variable speed high power machines'20086,401,875'Absolute position sensing method and apparatus for synchronous elevator machines by detection stator iron saturation'20025,808,240'Low-inductance planar bus arrangement'19985,635,689'Acceleration damping of elevator resonant modes and hydraulic elevator pump leakage compensation'19975,635,688'Start jerk reduction for an elevator'19974,718,559'Process for recovery of non-ferrous metallic concentrate from solid waste'19884,541,530'Recovery of metallic concentrate from solid waste'1985Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1985–1988Based in Nashville, TN, US· patent location history
1997–2002Patents assigned to OTIS ELEVATOR CO (4)· patent assignee history
1997Based in Bristol, CT, US· patent location history
1998Based in Plainville, CT, US· patent location history
2002–2019Based in Roanoke, VA, US· patent location history
2008–2019Patents assigned to GEN ELECTRIC (18)· patent assignee history
2011–2016Patents assigned to SHEPARD MARK EUGENE (8)· patent assignee history
2012–2015Patents assigned to WAGONER ROBERT GREGORY (4)· patent assignee history
2012–2015Patents assigned to RITTER ALLEN MICHAEL (3)· patent assignee history
2015–2019Based in Salem, VA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GEN ELECTRIC | 18 | 2008–2019 |
| SHEPARD MARK EUGENEself | 8 | 2011–2016 |
| OTIS ELEVATOR CO | 4 | 1997–2002 |
| WAGONER ROBERT GREGORY | 4 | 2012–2015 |
| RITTER ALLEN MICHAEL | 3 | 2012–2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Roanoke, Virginia, US | 17 | 2002–2019 |
| Salem, Virginia, US | 2 | 2015–2019 |
| Bristol, CT, US | 2 | 1997 |
| Nashville, TN, US | 2 | 1985–1988 |
| Plainville, CT, US | 1 | 1998 |