The object
Jake Epstein co-invented Rocketbook, a reusable notebook system that connects handwritten pages to digital capture and cloud workflows. A U.S. patent names Epstein and Joe Lemay as inventors, while a current entrepreneur profile identifies Epstein as Rocketbook’s co-founder and the creator of reusable cloud-connected notebooks.
01
What Jake did
co-invented Rocketbook, a reusable physical notebook system designed for app capture, cloud organization, and repeated use
02
Why it matters
Rocketbook created a widely recognized reusable smart-notebook format that linked physical writing with phone scanning and cloud sharing.
03
Living-status check
Entrepreneur’s 2026 current Jake Epstein profile identifies him as Rocketbook co-founder and creator of reusable cloud-connected notebooks.