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Inventor

Mark D. Ehresman

Inventor
Haverhill, MA, US

Overview

2→
Patents
1994–2012
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B23Hprimary
B23HWorking of metal by the action of a high concentration of electric current on a workpiece using an electrode which takes the place of a tool33%
B21KMaking forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels17%
B23PMetal-working not otherwise provided for17%
G01NInvestigating or analysing materials by determining their chemical or physical properties17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
8,338,736'Extraction of chordal test specimens from forgings'20125,360,957'Controlled apparatus for electrical discharge machining'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–2012Patents assigned to GEN ELECTRIC (2)· patent assignee history
1994–2012Based in Haverhill, MA, US· patent location history
2012Patents assigned to ALLEN JR CLIFFORD EDWARD (1)· patent assignee history
2012Patents assigned to DAY CHRISTOPHE JUDE (1)· patent assignee history
2012Patents assigned to EHRESMAN MARK DOUGLAS (1)· patent assignee history
2012Patents assigned to GAMBONE MICHAEL JOSEPH (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GEN ELECTRIC21994–2012
ALLEN JR CLIFFORD EDWARD12012
DAY CHRISTOPHE JUDE12012
EHRESMAN MARK DOUGLASself12012
GAMBONE MICHAEL JOSEPH12012
Locations
LocationPatentsSpan
Haverhill, Massachusetts, US21994–2012