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Inventor

Edgar C. Schroeder

Inventor
San Antonio, TX, US

Overview

6→
Patents
1987–2011
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 6 as inventor

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

F04Bprimary
F04BPositive-displacement machines for liquids27%
G01VGeophysics27%
F16DCouplings for transmitting rotation18%
G10KSound-producing devices18%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
PatentTitleYear
7,916,578'Seismic wave generation systems and methods for cased wells'20115,096,394'Positive displacement pump with rotating reciprocating piston and improved pulsation dampening'19925,074,767'Positive displacement pump with rotating reciprocating piston and improved lubrication feature'19915,022,831'Positive displacement pump with rotating reciprocating piston'19914,706,228'Asymmetrical lateral-force seismic source transducer'19874,651,311'Electrodeless spark discharge acoustic pulse transducer for borehole operation'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to SOUTHWEST RES INST (2)· patent assignee history
1987–2011Based in San Antonio, TX, US· patent location history
1991Patents assigned to HYPRO CORP (2)· patent assignee history
1992Patents assigned to GERLACH C RICHARD (1)· patent assignee history
1992Patents assigned to SCHROEDER EDGAR C (1)· patent assignee history
2011Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HYPRO CORP21991
SOUTHWEST RES INST21987
GERLACH C RICHARD11992
SCHLUMBERGER TECHNOLOGY CORP12011
SCHROEDER EDGAR Cself11992
Locations
LocationPatentsSpan
San Antonio, Texas, US61987–2011