| All Patents in class 81/101 |
Patents 31 -
45
of 47
      |
| Number | Date | Patentee | Title | Type |
| 1,430,955 | Oct. 03, 1922 | J.J. Demers | Wrench | wrench components |
| RE15,674 | Aug. 14, 1923 | G.C. Lawson | Pipe Wrench | pipe wrenches |
| 1,495,751 | May 27, 1924 | J.V. Larson | Adjustable Wrench | pipe wrenches |
| 1,549,164 | Aug. 11, 1925 | W.O. Thewes | Pipe Wrench | pipe wrenches |
| 1,552,091 | Sep. 01, 1925 | W.O. Thewes | Pipe Wrench | pipe wrenches |
| 1,570,586 | Jan. 19, 1926 | J.E. Kenerson | Wrench | wrench handle components |
| 1,676,210 | Jul. 03, 1928 | P. Armstrong | Pipe Wrench | pipe wrenches |
| 1,711,083 | Apr. 30, 1929 | A.O. Brungardt | Process of Making Wrenches | pipe wrenches |
| 1,727,623 | Sep. 10, 1929 | W.O. Thewes | Wrench | pipe wrenches |
| 1,734,734 | Nov. 05, 1929 | G.C. Lawson | Wrench | pipe wrenches |
| 1,778,748 | Oct. 21, 1930 | L.G. Bayner | Wrench | pipe wrenches |
| 1,862,002 | Jun. 07, 1932 | A.O. Brungardt | Pipe Wrench | pipe wrenches |
| 2,650,512 | Sep. 01, 1953 | C.G. Ertell, W.J. Johnson | Pipe Wrench with Nut Fulcrumed Pivoted Outer Jaw | pipe wrenches |
| 2,656,751 | Oct. 27, 1953 | C.G. Ertell, W.J. Johnson | Replaceable Jaw Insert for Pipe Wrenches | wrench jaw components |
| 2,700,911 | Feb. 01, 1955 | K.T. Dyczynski | Pipe Wrench With Spring-Biased Hook Jaw | pipe wrenches |
