1891 PATENT for FIRST ELECTRICITY METER ポスター

From 1881, inventor Thomas Edison's ELECTRIC METER patent, which could measure how much electricity had been used over a specific time at a location. The core MONEY MAKER at world utility companies. In his own words: In a system of electric generation and distribution where electricity is generated at a central station and thence distributed to consumers, a meter which shall indicate exactly the amount supplied to a customer is a desideratum.