Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Filtration method and a filter device for removing impurities from the air of a limited space and an apparatus for removing carbon dioxide from the air of an air-raid shelter

Filtration method and a filter device for removing impurities from the air of a limited space and an apparatus for removing carbon dioxide from the air of an air-raid shelter

US Patent 7601189 · Granted Oct 13, 2009

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Arrangement and process for carrying out an intensified combustion2020
Scrubbing device for gas used in a fuel cell and method of scrubbing gas using t2020
Arrangement for transferring heating and cooling power2000
Method and apparatus for charging and discharging electric energy1997
Method and apparatus for dewatering a fibrous web1986
Method and apparatus for drying objects1982