| Schedule of intangible assets |
| |
|
|
|
August 1, 2021 |
|
| |
|
Estimated Life |
|
Gross Carrying Amount |
|
|
Accumulated Amortization |
|
|
Net carrying amount |
|
| Patents |
|
10 Years |
|
$ |
2,559,400 |
|
|
$ |
(1,532,308 |
) |
|
$ |
1,027,092 |
|
| Trademarks |
|
3 Years |
|
|
1,282,315 |
|
|
|
(1,120,394 |
) |
|
|
161,921 |
|
| Other intangibles |
|
5 Years |
|
|
839,737 |
|
|
|
(839,737 |
) |
|
|
- |
|
| Total |
|
|
|
$ |
4,681,452 |
|
|
$ |
(3,492,439 |
) |
|
$ |
1,189,013 |
|
| |
|
|
|
January 31, 2021 |
|
| |
|
Estimated Life |
|
Gross Carrying Amount |
|
|
Accumulated Amortization |
|
|
Net carrying amount |
|
| Patents |
|
10 Years |
|
$ |
2,387,328 |
|
|
$ |
(1,128,997 |
) |
|
$ |
1,258,331 |
|
| Trademarks |
|
3 Years |
|
|
1,239,334 |
|
|
|
(980,633 |
) |
|
|
258,701 |
|
| Other intangibles |
|
5 Years |
|
|
839,737 |
|
|
|
(839,737 |
) |
|
|
- |
|
| Total |
|
|
|
$ |
4,466,399 |
|
|
$ |
(2,949,367 |
) |
|
$ |
1,517,032 |
|
|