Patents:

The secret sharing mechanism using anonymous reconstruction

Motivations:

https://vitalik.ca/general/2021/01/11/recovery.html

https://blog.keys.casa/announcing-casa-covenant-bitcoin-inheritance-service-and-protocol/

https://cointelegraph.com/news/what-happens-to-your-bitcoin-when-you-die

https://blog.1password.com/how-to-use-1password-to-manage-cryptocurrency

Cryptoasset Inheritance Planning with Pamela Morgan: https://youtu.be/Wk7Oz_tNSTM

Competitive solutions:

Competitive analysis: