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Inventor

Dave Switzer

Inventor
Calgary, CA

Overview

2→
Patents
2009–2010
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 2 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
7,839,719'Fluid erosion protection washer for rotating shaft in MWD tool'20107,532,540'Fluid erosion protection washer for rotating shaft in MWD tool'2009

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2009Patents assigned to EXTREME ENGINEERING LTD (1)· patent assignee history
2009–2010Based in Calgary, CA· patent location history
2010Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
EXTREME ENGINEERING LTD12009
SCHLUMBERGER TECHNOLOGY CORP12010
Locations
LocationPatentsSpan
Calgary, CA22009–2010