Eric Mark Chelgren

📍 Vinton, IA: #5 of 28 inventorsTop 20%

🗺 Iowa: #3,757 of 15,303 inventorsTop 25%

Overall (All Time): #1,239,799 of 4,157,543Top 30%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
8011680	Wheelchair suspension system	—	2011-09-06
7032917	Rear suspension for wheelchair	—	2006-04-25
D495629	Shock absorbing rear suspension for wheelchair	—	2004-09-07
6149169	Caster fork with dampener	—	2000-11-21