How to record your own authorship of an invention as simply as possible?

Question

Copyright

The idea of, say, a revolutionary iPhone stand was born in my head. An industrial designer is hired remotely to visualize this business. How to fix your own authorship of the idea in this case and in the future? The project itself is planned to be sold to a company that deals with similar devices, so the question of authorship will be relevant for cooperation with it.

Answer 1

Describe your idea in a letter and mail it to yourself. I think a dated postmark on a sealed letter might serve as proof. Just first make sure that the letter is returned, otherwise we know this mail ...

Answer 2

If an invention is a patent.
Imagine a situation. Someone came up with the same idea before you. But now he is considering it, does not post any information in public. And you start doing it at the same time (or almost at the same time).
How do you know which one is first?
By the way, on the topic of copyright. Copyright can be on any work. The idea is not subject to copyright - you need to pull it up under a patent.

Answer 3

Authorship and copyright are two different things.
Authorship only says that you did it, but does not prohibit others from doing it. If a letter, then registered. But by publishing on youtube you can protect your authorship - I think this is unlikely to suit you.
If a patent, then in your case at Prom. sample. But this is still the same dregs, the Russian one is cheap, but it works only in the Russian Federation, where there is really no production or market, and you can go broke on international patents.