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PennEnergy (Div. of PennWell) is a Tulsa, OK-based company in the Energy and Utilities sector.
Carpenter Harry P and Sons is a Stamford, CT-based company in the Energy and Utilities sector.
Swift Worldwide Resources - North America is a Houston, TX-based company in the Energy and Utilities sector.
Welltest Specialists is a Calgary, AB-based company in the Energy and Utilities sector.
Hydrostor is a leader in Advanced Compressed Air Energy Storage (A-CAES), a technology uniquely suited to enable the transition to a cleaner, more reliable electricity grid.