Inventor
active
Mechanical digital stopwatch
Toy simulating a calculator
No associations
LandOfFree
Richard Shih-Teng Chang does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Richard Shih-Teng Chang, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Richard Shih-Teng Chang will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-1604455