![]() | ![]() | ||
Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login |
Quick search: | Patent number: | Patent Date: |
Patents for Frank H. Duffy | |||||
![]() ![]() ![]() ![]() ![]() ![]() | |||||
Picture | Number | Date | Patentee | Title | |
187,513 | Feb. 20, 1877 | E.E. Colby | Improvement in bridges | ||
![]() | 206,067 | Jul. 16, 1878 | R. Allison | Feed Screw and Nut For Rock Drills, etc. | |
![]() | 226,339 | Apr. 06, 1880 | J. Moffet | Monkey-Wrench |