John Hall — 1 Patent in 2021

VPViking Pump: 1 patents #1 of 7Top 15%

Cedar Falls, IA: #16 of 59 inventorsTop 30%

Iowa: #535 of 1,785 inventorsTop 30%

Overall (2021): #398,384 of 548,734Top 75%

1 Patents 2021

Issued Patents 2021

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
11168794	Double seal lubricated packing gland and rotating sleeve	Christopher Mihm, Andrew Anderson, Michael R. Crawford	2021-11-09