Douglas J. Markham

📍 Westlake Village, CA: #19 of 53 inventorsTop 40%

🗺 California: #8,284 of 26,763 inventorsTop 35%

Overall (2002): #227,697 of 266,432Top 90%

Patents 2002

Issued Patents 2002

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
6450929	Door mounted exercizing device	—	2002-09-17