Margaret B. Hutchison

📍 Walnut Creek, CA: #806 of 1,300 inventorsTop 65%

🗺 California: #247,236 of 386,348 inventorsTop 65%

Overall (All Time): #3,804,660 of 4,157,543Top 95%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5340079	Hand control valve	John W. Hutchison	1994-08-23