Re: 58-025710 Fujitsu, Variable Frequency Oscillator, is a single claim.

(see also: http://www.patentgenius.com/search/variable%20frequency%20oscillator/1.html )

Re: '336 MMP Portfolio, A microprocessor which incorporates a ring oscillator.

"A high performance, low cost microprocessor system having a variable speed system clock is disclosed herein. The microprocessor system includes an integrated circuit having a central processing unit and a ring oscillator variable speed system clock for clocking the microprocessor. The central processing unit and ring oscillator variable speed system clock each include a plurality of electronic devices of like type, which allows the central processing unit to operate at a variable processing frequency dependent upon a variable speed of the ring oscillator variable speed system clock. The microprocessor system may also include an input/output interface connected to exchange coupling control signals, address and data with the central processing unit. The input/output interface is independently clocked by a second clock connected thereto."

http://www.patentgenius.com/patent/5809336.html

Q. Would Fujitsu license a product for which they have a patent?

http://www.ptsc.com/news/press_releases/20060302.asp

I believe that the provided documentation is there to substantiate the validity of the patents under USPTO reexamination.

Be well