| Patents for Porter A. Gladwin |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 17,541 | Jun. 09, 1857 | P.A. Gladwin | Tonguing and Grooving Hand-Plane | match planes |
| 19,359 | Feb. 16, 1858 | P.A. Gladwin | Method of Securing the Plane-Iron to its Stock | plane cutter adjustments |
| 185,442 | Dec. 19, 1876 | P.A. Gladwin | Improvement in Match-Planes | plane fences |
| 202,105 | Apr. 09, 1878 | P.A. Gladwin | Combination Plane and Tool Handle | combination tools |
| 248,854 | Nov. 01, 1881 | P.A. Gladwin | Auger Bit with Cross-Channel Lead Screw | auger bits |
| 269,406 | Dec. 19, 1882 | P.A. Gladwin | Auger | adjustable drill bits |
| 287,271 | Oct. 23, 1883 | P.A. Gladwin | Bench Vise | bench vises |
