Membership
Tour
Register
Log in
Walter A. Helm
Follow
Person
Farmington, CT, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for communicating with devices downhole in a w...
Patent number
6,105,690
Issue date
Aug 22, 2000
APS Technology, Inc.
Denis P. Biglin
E21 - EARTH DRILLING MINING