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Douglas Ritchie

BDBy Design: 1 patents #1 of 1Top 100%

Bourne, MA: #1 of 3 inventorsTop 35%

Massachusetts: #582 of 2,831 inventorsTop 25%

Overall (1989): #119,074 of 140,708Top 85%

1 Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
D302528	Prism clock	—	1989-08-01