Oct 29 (Reuters) - U.S. solar panel maker First Solar ( FSLR )

has notified several large rivals that it believes they

are infringing on its patents on a leading solar technology,

executives said on a conference call with analysts on Tuesday.

First Solar ( FSLR ) said it has sent letters, through its attorneys,

to Canadian Solar ( CSIQ ), JA Solar, Longi

, Jinko Solar and Trina Solar

, according to a slide presentation on its web site.