1. It is highly unlikely your company is going to develop something really different in terms of algorithms and techniques that needs this kind of protection.
2. Many companies have developed successful products without hiding the code -- e.g. Revtrac, Ariba, SAP...
3. If you really want to hide what you are doing, don't do it in ABAP; use Java or C, and interface with RFC/BAPI.
4. If you do manage to do it, maintenance and support will be very difficult.
My advice is: DON'T.
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