DJ

Douglas Johnston

CL Canadian Patents And Development Limited: 1 patents #88 of 449Top 20%
📍 Ottawa, CA: #1,320 of 6,399 inventorsTop 25%
Overall (All Time): #1,057,685 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
5312045 Liquid metering distributor for agricultural chemicals 1994-05-17
4624193 Method and apparatus for the jet injection of agricultural liquids into the soil 1986-11-25
4519542 Boomless, sprayer for field application for agricultural liquids 1985-05-28
4306545 Re-entrant cannula device Michael E. Ivan 1981-12-22
4267971 Method and means of presetting the output rate of a centrifugal pump agricultural metering system 1981-05-19