Tecogen Announces Issuance of Two Additional US Patents Protecting Its Ultera Emissions Reduction Technology September 24, 2020 WALTHAM, MA, Sept. 24, 2020 (GLOBE NEWSWIRE) -- via NewMediaWire -- Tecogen Inc. (OTCQX: TGEN), a clean energy company providing ultra-efficient and clean on-site power, heating and cooling equipment, is pleased to announce that on September 15, 2020 the US Patent and Trademark Office issued two additional patents to Tecogen relating to its Ultera emissions reduction technology. The technology covered by US patent No. 10,774,720 titled, `NOx Reduction Using a Dual-Stage Catalyst System with Intercooling in Vehicle Gasoline Engines under Real Driving Conditions,`...
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