A Chicago creative agency has purchased Seattle-based Methodologie for an undisclosed price. Methodologie, which specializes in brand and corporate communications, was founded as a solo shop in Seattle in 1988. The agency, which employs 17, has offices in both Seattle and New York and has worked with several national clients, including Boeing, Coca-Cola and Target. Besides Chicago, the company that is acquiring Methodolgie, Digital Kitchen, has offices in Los Angeles and Seattle, where it employs…