JH

John R. Heffron

📍 Iron River, MI: #6 of 32 inventorsTop 20%
🗺 Michigan: #1,670 of 6,370 inventorsTop 30%
Overall (2003): #193,528 of 273,478Top 75%
1
Patents 2003

Issued Patents 2003

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