DG

David Groesbeck

HL Hall Labs: 2 patents #73 of 153Top 50%
Overall (All Time): #1,855,593 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11441345 System for adjusting the counterbalance of an overhead door David R. Hall, Michael Hall, Jerome Miles 2022-09-13
11441347 Mechanism for opening and closing an overhead door including one way bearing David R. Hall, Jerome Miles 2022-09-13