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International Isotopes Inc. manufactures a range of nuclear medicine calibration and reference standards, high purity fluoride gases, cobalt teletherapy sources, radioisotopes, and radiochemicals for medical, research, and clinical devices. It operates in six segments: Nuclear Medicine Standards, Cobalt Products, Radiochemical Products, Fluorine Products, Radiological Services, and Transportation. The Nuclear Medicine Standards segment manufactures sources and standards associated with single photon emission computed tomography, patient positioning, and calibration or operational testing of dose measuring equipments for the nuclear pharmacy. It offers flood sources, dose calibrators, rod sources, flexible and rigid rulers, spot markers, pen point markers, and various specialty design products. The Cobalt Products segment engages in the production of bulk cobalt; fabrication of cobalt capsules for teletherapy and irradiation devices; and recycling of expended cobalt sources. The Radiochemical Products segment produces and distributes a range of radiochemicals used in the treatment and diagnosis of various diseases of the thyroid as well as in a host of investigational and clinical trials, such as for the treatment of breast, lung, prostate, and ovarian cancers. The Fluorine Products segment produces various high purity fluorine products, such as germanium tetrafluoride, silicon tetrafluoride, and boron trifluoride. The Radiological Services segment offers processing services for gemstones that have undergone irradiation for color enhancement, radiological engineering consultant services, contract shipping services, research and development activities, Type A package certification testing, and on location packaging services. The Transportation Services segment provides transportation of cobalt sources, as well as offers transportation services of hazardous and non-hazardous cargo materials. The company was founded in 1995 and is headquartered in Idaho Falls, Idaho.

Invisa, Inc. manufactures and sells sensors that utilize InvisaShield presence-sensing design and technology for applications in safety market. The company sells a line of SmartGate brand safety sensors, which are life and property safety devices used in or with powered closures-mechanisms, such as parking gates, slide gates, overhead garage doors, and overhead doors. The SmartGate safety sensors are incorporated into powered parking gates that are used for controlling the flow of vehicular traffic, such as parking facilities, vehicle storage facilities, toll booths, and metered entry points for highways. The company also provides InvisaShield sensors that create invisible presence-sensing fields around displays and exhibits, as well as detects persons trying to enter the monitored zone for preventing vandalism or inadvertent damage. Its InvisaShield security sensors are used for museum applications, as well as for retail, industrial, commercial, defense, and government applications. Invisa sells its products to manufacturers, distributors, dealers, and end-users. The company was founded in 1992 and is based in Sarasota, Florida.

ION Geophysical Corporation provides advanced seismic data acquisition equipment, software, planning, processing, and interpretation services to the energy industry worldwide. It operates in four segments: Land Imaging Systems, Marine Imaging Systems, Data Management Solutions, and ION Solutions. The Land Imaging Systems segment offers cable-based, cableless, and radio-controlled seismic data acquisition systems, digital and analog geophone sensors, vibroseis vehicles, and source controllers for detonator and vibrator energy sources. The Marine Imaging Systems segment provides towed streamer and redeployable ocean bottom cable seismic data acquisition systems and shipboard recorders, streamer positioning and control systems, and air guns and air gun controllers. The Data Management Solutions segment offers software systems and services for towed marine streamer and seabed operations. It provides Orca for towed streamer navigation and integrated data management applications; SPECTRA, a navigation and survey control software system for seismic survey operations; GATOR software system for ocean bottom cable and transition zone operations; consulting services for planning, designing, and supervising of 4-D and WATS survey operations; and post-survey analysis tools, including SPRINT navigation processing and quality control software for marine geophysical surveys, and REFLEX software for navigation and seismic data analysis. The ION Solutions segment offers seismic data processing and imaging services for marine and land environments, and a seismic data library, as well as integrated seismic solution services to manage the seismic process, such as survey planning and design, data acquisition and management, and pre-processing and final subsurface imaging. The company was formerly known as Input/Output, Inc. and changed its name to ION Geophysical Corporation in September 2007. ION Geophysical Corporation was founded in 1968 and is headquartered in Houston, Texas.

IRIS International, Inc. designs, develops, manufactures, and markets in vitro diagnostic (IVD) products, consumables, and supplies for urinalysis and body fluids. It offers morphology and related products, including iQ analyzer, an automated urine microscopy and body fluids analyzer; iChem VELOCITY and iRICELL, an automated urine chemistry analyzer; and consumables for urine microscopy and chemistry analyzers, including urine and body fluids reagents, calibrators, and controls for microscopy systems and test strips, calibrators, controls, and other solutions for the urine chemistry analyzers. The company's morphology products in development-stage include automated urine bacteria screening instrument and 3GEMS urinalysis and hematology analyzers. It also offers sample processing products, including Express centrifuge line, centrifuges for clinical diagnostic market; ThermoBrite, a DNA workstation for FISH procedures; Cytofuge 2, centrifuges used for thin layer cell preparation; IDEXX centrifugal drive system, which is used for internal use in IDEXX chemistry analyzers; and IDEXX whole blood separator, a consumable used in IDEXX chemistry analyzers. In addition, the company engages in developing ultra-sensitive cancer and infectious disease diagnostic tests based on its NADiA technology platform. The company serves medical institutions, commercial laboratories, clinics, doctors offices, veterinary laboratories, and research facilities. IRIS International, Inc. was incorporated in 1979 and is headquartered in Chatsworth, California.

Isomet is the world's leading producer of acousto-optic (AO) devices that are used in a wide variety of applications including graphic arts, semiconductor wafer inspection, military systems, materials processing, and biophotonics. The company headquarters is located in Springfield, VA with an operating subsidiary in the United Kingdom. Isomet major product line is acousto-optics; the company also offer custom fiber-optic components and custom fabrication/A-R coating of most optical materials.

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