A summary of Southern California-related business litigation developments during the past week.

Longs Drug Accused of Trademark Infringement: Mag Instrument Inc. of Ontario sued Longs Drug Store California Inc. of Walnut Creek, alleging that it is infringing on six patents for miniature and full-size flashlights by selling imitations. The U.S. District Court suit filed in Los Angeles seeks an injunction barring Longs from infringing on its patents or inducing others to infringe on them, a list of who Longs has distributed its flashlights to and from whom it bought them. The lawsuit also seeks unspecified damages from profits Longs has received from the flashlights plus treble damages. (Case No. 90-5750. Filed Oct. 24, 1990)