7. Intangible Assets

Intangible assets as at May 31, 2023 and February 28, 2023 were $1,278 and $1,210, respectively.

During the three-month periods ended May 31, 2023 and 2022, we made additions relating to patent application costs to intangible assets of $99 and $69, respectively.

Amortization expense for the three-month period ended May 31, 2023 amounted to $32 (2022 – $20).