ENVIRONMENTAL INSTRUMENTS, INC., PLAINTIFF-APPELLANT, v. THE SUTRON CORPORATION, DEFENDANT/CROSS-APPELLANT. Nos. 88-1475, 88-1477.United States Court of Appeals, Federal Circuit. June 15, 1989. Page 1562 Philip G. Koenig, Wolf, Greenfield Sacus, P.C., Boston, Mass., argued for plaintiff-appellant. With him on the brief was James H. Laughlin, Jr., Benoit, Smith Laughlin, Arlington, Va. John S. Hale, Gipple Hale, […]