| 1 | TM-1 | 03 May 1991 |
| 2 | Correspondence | 25 Jan 2010 |
| 3 | Correspondence | 26 Apr 2013 |
| 4 | Correspondence | 08 Nov 2013 |
| 5 | TM-R(RENEWAL WITH SURCHARGE) | 05 May 2018 |
| 1 | RENEWAL NOTICE | 4550834 | 17 Feb 2017 | |
| 2 | O3 NOTICE | 5895888 | 15 Feb 2018 | |
| 3 | RENEWAL INTIMATION LETTER | 6329269 | 09 May 2018 |