7. Intangible Assets

Intangible assets as at November 30, 2023 and February 28, 2023 were $1,485 and $1,210, respectively.

During the nine-month periods ended November 30, 2023 and 2022, we made additions relating to patent application costs to intangible assets of $378 and $225, respectively.

Amortization expense for the three- and nine-month periods ended November 30, 2023 amounted to $38 and $105, respectively (2022 – $23 and $63).