USPatent 3,937,202--Economy Driving Aid - Fuel Economy, Hypermiling, EcoModding News and Forum

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USPatent 3,937,202--Economy Driving Aid

01-06-2010, 10:20 PM	#1 (permalink)
gone-ot ...beats walking... Join Date: Jul 2009 Location: . Posts: 6,190 Thanks: 179 Thanked 1,525 Times in 1,126 Posts	USPatent 3,937,202--Economy Driving Aid ...anybody seen / read about this before? Economy driving aid - Google Patent Search ...looks like a "high-tech" vacuum-switch "vacuum gauge."

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