Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6102628 | Arch useful for withstanding effect of rockburst occurring in underground mines/tunnels | Bharat Bhushan Dhar, Pinaki Ranjan Ghosh | 2000-08-15 |
| 5769504 | Equipment for shortwall mining useful for extraction of pillars in underground coal mines | Bharat Bhushan Dhar, Sibnath Mukherjee | 1998-06-23 |
| 5368369 | Equipment useful for winning ores particularly coal in longwall mining | Bharat Bhushan Dhar | 1994-11-29 |