ic is CLASS CODE. The classification means: 009 008 010 and so on. There are dozens (like 001 to 045).

us The American standard trademark code is such as: 021 023 Wait, this code is too much

g s is G&S=GOODS AND SERVICES goods and services category

Give a complete example:

IC 009. US 021 023 026 036 038. G & S: Adhesive-backed mount and d-ring for attaching to computers, consumer electronics, mobile phone and mobile devices.