SAN JOSE — U.S. District Judge Lucy Koh ruled Friday that plaintiffs have provided enough evidence to move forward with claims that four of the nation’s largest technology companies conspired to drive down employee wages through a web of agreements not to recruit each other’s workers.

It should be up to a jury to decide whether that conspiracy existed, Koh concluded, denying motions for summary judgment filed in January by Google Inc., Adobe Systems Inc., Intel Corp. and Apple Inc.