4. Metal tools and implements, making
  5. Blank or process
  6. Drill

John D. Barr

Inventor

Rate now
  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Inventor

active

Cutting elements for rotary drill bits

Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Cutting elements for rotary drill bits

Abrasive tool making process – material – or composition – Miscellaneous
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Cutting elements for rotary drill bits

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Cutting structures for rotary drill bits

Boring or penetrating the earth – Bit or bit element – Cutting edge self-renewable during operation
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Drag bit and cutters

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

John D. Barr does not yet have a rating. At this time, there are no reviews or comments for this inventor.

If you have personal experience with John D. Barr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and John D. Barr will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-P-44113

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.

Canada

 Charities
 Companies
 MP Candidates
 Patents
 Employee Salary Disclosure

World

 Places of the World
 Scientific Papers

United States

 Banks
 Companies
 Counties
 Patents
 Employee Salary Disclosure