In 1973, while still working for Hohner, Cham Ber Huang was granted patent #2260752. The patent described a revolutionary new harmonica concept. The complete history can be read on Cham Ber’s website. The CBH 2012 and 2016 (12 and 16 channel models) came with the slide button positioned at the lower part of the harmonica, contrary to all Hohner standard chromatics at that time. The CBH was mostly made out of a specific kind of resin even mixing in Teflon to improve resistance to abrasion and wear.
There is a video of Cham Ber talking about his manually build CBH 2012 made out of solid silver.
Another interesting video was made available by Roger Trobridge about Cham Ber Huang CBH Workshop (from 1972).
CBH harmonicas were discontinued after a patent court trial between Hohner
and Mr. Huang. The patent went to Mr. Huang, and the CBH models were not made after 1983.