You might rest a bit easier if you look at the prior art referenced in Patent 5440749, which covers crystal clocks, on chip clocks, on plus off chip clocks, on chip memory and just about everying for which there is a claim. So in addition to the prior art mentioned in the 336 there is a slew of other prior art cited in the 749 including Thaden, Mager and Guttag. While Ledzius and others are not referenced, they wouldn't have added anything to what was there looking at prior art of both patents. IMHO the only basis for rejecting would be if it was proven that the examiner was incompetent or bribed. Rest easy. Opty