|
I suppose in general there were many variation of things such as compositions.
Large companies like RCA, Sylvania, etc. could afford to research things. Patents on some things could cause some manufacturers to come up with variations. Company secrets in other words. Coca-Cola and Pepsi-Cola.
Other countries had other large companies and even universities did some research.
The cost and availability in different areas could also effect the formula what was used.
|