History of Growth

1943	Stone Industrial Corporation S.W. Briggs & W.A. Brazerol developed pleated paper filter cartridges to replace waste cotton sock type filters used in diesel locomotives
1949	Stone Filter Co. Created as a subsidiary of S.I.C. to supply EMD and a few railroads
1971	J.L. Clark Manufacturing Co. Purchased S.I.C. (College Park, MD)
1974	Stone Filter Subsidiary Moved to Lancaster, PA (present location) and was named Paper Products Division of J.L. Clark
1987	J.L. Clark Manufacturing Co. renamed CLARCOR, Paper Products Division renamed Clark Filter
1992	CLARCOR acquired the assets of M & J Diesel Locomotive Filter Co. (Chicago) and moved them to Lancaster to expand Clark Filter
1993	CLARCOR acquired Guardian/United Engine Life Filtration Co. (Louisville, KY) and transferred all lube & fuel filter production and sales to Clark Filter
1994	Moved railroad air filtration products from U.E.L. to Lancaster to expand Clark Filter
1995	Moved all roll-pack (sock type) production and sales from U.E.L. to Clark Filter
1996	Airguard and Clark set-up fiberglass "baggie" line to supply Engine Guard air intake filters for railroads worldwide
1997	Baldwin helped FIBAMEX and Clark establish Mexico City production to serve the Mexican railroads
2000	Moved Locomotive Baggies air filter production to Lancaster, PA. This state of the art production system makes the Clark product second to none in the industry.
2001	Initiated Panel Filter production
2002	Moved all roll-pack (sock type) production and sales to FIBAMEX (Mexico City)
2002	Moved Dust Collector Cartridge production from Airguard (Louisville, KY) to Clark Filter
2006	CLARCOR acquired the assets of Leedar Inc. (Shawnee, OK) and moved to Lancaster for expanding industrial product line
2007	Clark Filter introduces ProTura® - Advanced Nanofiber Filtration Technology - Manufactured in Lancaster, PA
2010	Clark Filter introduces ProPulse™ - Advanced Pleated Bags designed for bag house dust collection - Manufactured in Lancaster, PA