As a general practice, it is advisable to license the patent rights instead of assigning the complete patent. This way, you will have control over the invention (technology) and in case anything does not go the way it was expected to go with investors, you will retain the patent rights and corresponding license rights can be revoked.

Obviously, such licensing will require a suitable patent licensing agreement, including provisions related to scope, term, royalty, and the like.

In case you wish to discuss this further, feel free to get in touch.

Best Regards,

Rahul Dev

http://www.advocaterahuldev.com