Granted, or merely published? Acer's US11209866B2, "Foldable electronic device" (issued December 28, 2021; inventor Yan-Lin Kuo), carries the B2 kind code — an issued grant, not a pending application. Its CPC mix spans flexible-display and folding-support classes (G06F 1/1652, 1/1641, 1/1681) alongside phone-form classes (H04M 1/022, 1/0268).
The strategic point is the assignee. The popular foldable story features Samsung, with supporting roles for the other phone giants. But a PC and accessory maker like Acer holding a granted foldable patent shows the field is wider than that — foldable form factors span phones, tablets, and laptops, and the companies filing on them include the PC makers, not just the handset brands.
What it reads on is a foldable electronic device of the recited structure — the claim language defines whether that is phone-shaped, tablet-shaped, or laptop-shaped. The presence of H04M phone classes alongside general computing classes suggests a device that straddles categories, which is itself the trend foldables represent.
The granted-versus-pending discipline applies broadly across this category. The foldable space is dense with applications, and a competitor mapping freedom to operate cannot stop at the famous names' grants — issued patents held by less obvious assignees like Acer are equally enforceable and equally capable of blocking a design.
Scope, stated carefully: the enforceable reach is US11209866B2's independent claim, not the broad idea of a folding device. A foldable built on a materially different folding-and-support structure may avoid it. But its issued status makes it a real consideration, not a hypothetical.
For a landscape analyst, the lesson is breadth: the foldable patent map has many more pins than the headlines suggest. Treating it as a Samsung-versus-the-world story underestimates the number of granted obstacles a new entrant must navigate.