Why don't you just agree to list your prior inventions on a sheet, put it into a sealed document, and have it held by a trusted third party (a lawyer, a bank, a safe deposit box, etc)?
If there ends up being a dispute over whether an invention was something you already invented, you, knowing the contents of the list you created, can show the other party, or a court, just the relevant part of that sealed document. The rest of your secrets are not exposed and you have some pretty strong evidence if you need it.
I'd certainly make sure to make some representation that your list is not exhaustive, though.
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Why don't you just agree to list your prior inventions on a sheet, put it into a sealed document, and have it held by a trusted third party (a lawyer, a bank, a safe deposit box, etc)?
If there ends up being a dispute over whether an invention was something you already invented, you, knowing the contents of the list you created, can show the other party, or a court, just the relevant part of that sealed document. The rest of your secrets are not exposed and you have some pretty strong evidence if you need it.
I'd certainly make sure to make some representation that your list is not exhaustive, though.