Henry D. Rikkers

📍 Sioux Center, IA: #19 of 32 inventorsTop 60%

🗺 Iowa: #8,735 of 15,303 inventorsTop 60%

Overall (All Time): #3,825,394 of 4,157,543Top 95%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5216642	Sports collectors clock	—	1993-06-01