Can I amend an outdated prenuptial agreement?

My wife and I live in San Francisco and I work for a start-up tech company. The company has the potential to become very large and profitable. My wife and I signed a prenup before we married. I have some technology patents that I acquired before we married, and now my company may be interested in moving forward with some of my ideas and products. We didn’t specifically reference my patents in the prenup. I honestly didn’t even think about them at the time. If the patents do become valuable and my wife and I were to divorce, does she have an interest in them? If that is a possibility, is there anything I can do to amend the prenup so that the patents remain my property regardless of what happens to the marriage?