WHEN A CLAIMANT APPEARS AS THEIR OWN EXPERT WITNESS: IT RARELY ENDS WELL

In  Tehrani v Hamilton Bonaduz AG & Ors [2021] EWHC 3457 (IPEC) HHJ Hacon considered a case where a claimant appeared as their own expert witness.

 
THE CASE
The claimant, a professor, brought an action asserting that the defendant infringed her patent in relation to the method of controll...