Calgary
Canada
6
2018-12-20
The entities that hold a legal rights for patent applications filed by inventor Hult Vern A.:
Vern A. Hult from Calgary, CA has applied for patents for these inventions. The list has both pending applications and granted patents:
PUMP DRIVE HEAD WITH STUFFING BOX
#2 | 2016-07-14Polish rod locking clamp
#3 | 2015-07-02Polish rod locking clamp
#4 | 2008-12-04Cam-actuated centrifugal brake for preventing backspin
#5 | 2005-03-03Polish rod locking clamp
#6 | 2005-01-18Pump drive head with stuffing box
1213061 ⎘