Patent

Usually $8,000 to $18,000 to file, plus $3,000 to$12,000 over 2-3 years.

Copyright

About $200-500, although preliminary work can drive up costs substantially.

Trade Secret

Depends on extent of internal and external procedures.

Trademark

Nothing, but registration is typically $1,300-$3,000.

These are typical ranges. Costs can be much, much higher depending on circumstances.