Not so. Xerox later sued Apple but by then it was too little too late.
Is so.
yes, Xerox, under a new CEO who was unaware of what had actually transpired years before his tenure, did indeed sue and lost when Apple provided the court with the documentary evidence of the $7 million dollars in Apple Computer Inc. Preferred Stock granted to Xerox in exchange for the privilege of having two 8 hour visits at PARC AND using what they learned there.