Vault for active shooters and tornadoes

US11384530B2 · office US · priority 2017-04-28 · published 2022-07-12

U.S. Pat. No. 4,979,242 (Maggio '242) discloses a collapsible portable shelter, or changing room, comprising a circular bellows like configuration. The bellows-like walls overlap vertically and integrally down the side around a large aperture in a spring-like manner from tension on the rib folds by …

Inventor: James C. Brown · Assignee: Big 6, LLP

Open the patent document · source query “portable shelter”