DH

Dick L. Holmberg

📍 Whitehall, MI: #12 of 74 inventorsTop 20%
🗺 Michigan: #18,390 of 86,293 inventorsTop 25%
Overall (All Time): #1,060,468 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
5158395 Erosion control foundation mat and method 1992-10-27
4889446 Erosion control foundation mat and method 1989-12-26
4770561 Shoreline erosion control devices 1988-09-13
4690585 Erosion control foundation mat and method 1987-09-01
4657433 Shoreline erosion control mat and method of use therefor 1987-04-14