Douglas W. Francis

📍 Fort Walton Beach, FL: #10 of 88 inventorsTop 15%

🗺 Florida: #13,170 of 67,251 inventorsTop 20%

Overall (All Time): #1,257,110 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
D531926	Ring	—	2006-11-14
D531537	Ring	—	2006-11-07
D513711	Ring	—	2006-01-24
6267303	Sprinkler system fertilizer injector	—	2001-07-31