The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2026
Filed:
Dec. 15, 2021
Agency for Defense Development, Daejeon, KR;
Agency for Defense Development, Daejeon, KR;
Abstract
An absorption filter structure with increased filter efficiency in an easily detachable form for optional use with a helmet structure. The absorption filter structure includes a filtration unit to pass external air through an internal space in a filtration direction. An absorption layer, a filtering layer and a shielding layer are stacked in the filtration unit. For filtering the external air, an external air vent, and an internal air vent are also provided. When combined with a helmet, the absorption filter structure is configured to be easily detachable from the helmet.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile