Class B27M : WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B-B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
Subclass 3/14: Manufacture or reconditioning of specific semi-finished or finished articles (features of copying devices B23Q; manufacture of plywood or veneer, shaping plywood or veneer into articles B27D; of central layers for plywood B27D 1/06; nailing or stapling machines in general B27F 7/00; of elements for cooperage or wheel-making B27H) of railroad sleepers
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11479920 | Method for maintaining wood railroad ties | Jun 27, 22 | Oct 25, 22 | Railroad Solutions, Inc. |
| 11359336 | Railroad tie preservation system | Sep 18, 19 | Jun 14, 22 | Not available |
| 11255053 | Composition, device, and method for maintaining wood railroad ties | Aug 19, 20 | Feb 22, 22 | Railroad Solutions, Inc. |
| 9333670 | Treatment tank for wood articles | Sep 10, 12 | May 10, 16 | Not available |
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