Calgary
Canada
4
2024-09-12
The entities that hold a legal rights for patent applications filed by inventor Nelson Darrell:
Darrell Nelson from Calgary, CA has applied for patents for these inventions. The list has both pending applications and granted patents:
Improved Metering Systems & Methods
#2 | 2020-12-10Valve with expandable sleeve fitted over perforated walls of inlet and outlet channels to control flow therebetween
#3 | 2019-05-16Valve with Expandable Sleeve Fitted Over Perforated Walls of Inlet and Outlet Channels to Control Flow Therebetween
#4 | 2014-11-06Paddlewheel flow meter with improved servicability and improved reliability under harsh operating conditions
957465 ⎘