| All Patents in class 403/314 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 64,292 | Apr. 30, 1867 | J.W. Douglas | Improvement in hose-couplings |
 | 65,183 | May 28, 1867 | W.H. Doane, J. Richards | Improvement in shaft-coupling |
 | 122,426 | Jan. 02, 1872 | M.L. Andrew | Improvement in shaft-couplings |
 | 174,177 | Feb. 29, 1876 | H. Albrecht | Improvement in shaft-couplings |
 | 227,980 | May 25, 1880 | H. Kline | Shaft-coupling |
 | 443,627 | Dec. 30, 1890 | W.H. Nicholson | Shaft-Coupling |
| | 655,136 | Jul. 31, 1900 | T.F. Vandergrift | Shaft Coupling |
 | 771,951 | Oct. 11, 1904 | V.J. Wahlstrom | Coupling |
| | 1,273,724 | Jul. 23, 1918 | J.D. Boughner | Drill Rod Connection |
 | 1,393,064 | Oct. 11, 1921 | A.C. Woodward | Shaft-coupling |
