Comment by friendzis

Interesting question, actually. The ones calling for full and immediate assumption of liability on the principal either miss a thing or imply an interesting relationship.

The closest analogy we have, I guess, is the power of attorney. If a principal signs off on power of attorney to, e.g. take out a loan/mortgage to buy a thing on principal's behalf, that does not extend to taking any extra liabilities. Any extra liabilities signed off by the agent would be either rendered null or transferred to the agent in any court of law. There is extent to which agency is assigned.

The core questions here are agency and liability boundaries. Are there any agency boundaries on the agent? If so, what's the extent? There are many future edge cases where these questions will arise. Licenses and patents are just the tip of an iceberg.