Kraig Biocraft Laboratories Inc (KBLB)

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Very many heart valve manufacturers, maybe a competitive bidding war would start. Whomever gets the contract stands a good chance of moving to or staying in the top tier,

There are three heart valve manufacturers that are very, very, very reputable in the heart valve replacement market:

St. Jude Medical
Edwards LifeSciences
Medtronic

There are also some newer heart valve manufacturers that are creating different approaches to heart valve replacement using special tissue or catheter-based replacement techniques. Those heart valve manufacturers include:

eValve – Purchased by Abbott Laboratories
ATS Medical – Purchased by Medtronic
On-X
CoreValve – Purchased by Medtronic

There are some others:

Abbott Laboratories
Accellent Inc.
Admedes Schuessler GmbH
AorTech International plc
Arbor Surgical Technologies, Inc.
AutoTissue GmbH
Boston Scientific Corporation
CarboMedics Inc.
Cardiac Dimensions Inc.
Cardiosolutions, Inc.
Edwards Lifesciences
Endovalve, Inc.
JenaValve Technology GmbH
Leman Cardiovascular
Medtentia AB
Medtronic, Inc.
MiCardia Corporation
MitralSolutions, Inc.
On-X Life Technologies, Inc.
Sadra Medical, Inc.
Sorin S.p.A.
St. Jude Medical, Inc.
TTK Healthcare
ValveXchange, Inc.