JH

John R. Heffron

📍 Iron River, MI: #182 of 361 inventorsTop 55%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #3,520,768 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6609713 Scavenger hunt-type card-based game incorporating personality trait, command and/or event cards and method for playing same Joel C. Zimmer 2003-08-26