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SemGroup Corporation is a Tulsa, OK-based company in the Energy and Utilities sector.
Axion Power International, Inc. engages in the design, development, manufacture, and sale of advanced energy storage devices and components based on its patented PbC Technology. Its PbC batteries and components are used in energy system storage functions. The company also manufactures standard and specialty lead-acid batteries. Axion Power International, Inc. was founded in 2003 and is based in New Castle, Pennsylvania.
The Townsend Corporation is a Parker City, IN-based company in the Energy and Utilities sector.
Waterous Detroit Diesel Allison is a Edmonton, AB-based company in the Energy and Utilities sector.
PTW Energy Services is composed of three Alberta based companies to create one of the largest electrical, instrumentation and building fabricators in North America.