Houston-based Quikserv Corp., the manufacturer of drive-thru windows and related products, has purchased Easi-Serv Products, which makes similar products, including a line of vertical lift windows. Easi-Serv is based in Barnaby, British Columbia, Canada. Quikserv Buys Easi-Serv “The integration perfectly aligns with Quikserv’s strategy to broaden our product line, customer segments (and) market reach,” said…