I contacted Julia Chen of Ta Chiao - she indicated they designed the CT34. From a CT34 owner, he stated that Bob Perry said it was CS Chen. Hull #2 was built in 1976 - Hull #1 was "early 1970's".
From Julia Chen, Business Section, Ta Chiao, March 25, 2002: We designed and started to build the CT-34 from early 1970, and then stopped this line in 1987 after building 43 vessels.
From a CT34 owner: Our boat is also credited with being designed by Bob Perry but according to Bob it was CS Chen, one of the brothers that owned the Ta Chiao boat yard, who drew up the plans, and that the design was somewhat based on a Phillip Rhodes late 1920's design called "Dog Star". The Traveller 32 - the hull was built in Taiwan and then finished by Rawson (Redmond, WA) in the late 1970's - was also based on this design.
You can find a history of some of the CT34's at http://guildmark.com/crumpet/History.htm
From Tayana 37 newsgroup: Bob Berg (the real creator of the Tayana 37 and the creator of the BaBa boats) took his preliminary ideas to Bob Perry, who then did the formal design.). Mr. C.T. Chen of the Ta Chiao Bros., Taiwan, had been building a series of CT sailboats of various sizes. He asked Bob Perry to design a 37 footer for him. Bob Berg and Will Eckert, partners in Flying Dutchman Yachts, Seattle, worked with Perry on some of the basics. A picture of Hull #1 (the hull was used to make the mold for Tayana boats) appeared on the cover of Sea Magazine in 1975. Mr. Chen did not believe the "CT 37" would be a success so he gave the design rights to Ta Yang in exchange for a 10 interest in the boat.