Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4534527 | All weather switch for railroads | Semion Perlin | 1985-08-13 |
| 4356773 | Hydraulically driven railway car | — | 1982-11-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4534527 | All weather switch for railroads | Semion Perlin | 1985-08-13 |
| 4356773 | Hydraulically driven railway car | — | 1982-11-02 |