About Int'l. Crystal Mfg. Co. Inc.
- International Crystal Manufacturing Company, Inc. (ICM) is a family-owned, business established in 1951 to provide crystals, oscillators and filters for the military. Today, ICM manufactures in the U.S. an extensive line of quartz crystals, oscillators, filters, and TCXOs / VCTCXOs used in military applications, communications, microwave transmission, data acquisition and transmission, and cutting edge research.