Farr Co

Active Patents

Total Holdings

Patent Holdings

Patent No.	Title	Status	Filing Date	Grant Date	Actions
US2679090A	Method of making filters	Expired / Lapsed	1949-08-30	1954-05-25	Details
US2633929A	Apparatus for filtering air	Expired / Lapsed	1948-08-24	1953-04-07	Details
US2537217A	Filter unit	Expired / Lapsed	1946-09-27	1951-01-09	Details