WATERLOOV GUTTER PROTECTION SYSTEMS CO., INC., Plaintiff/Counterclaim Defendant-Appellee, and Richard L. Kuhns, Counterclaim Defendant-Appellee, v. ABSOLUTE GUTTER PROTECTION, L.L.C., Charles Knight, William Gumpper, Gumppers Gutter Service, Ray Vandergrift, Nelson Sensenig, Millway Home Improvements, L.L.C., and White Oak MFG, L.L.C., Defendants/Counterclaimants-Appellants, and Aqua Flow Gutter Protection Systems Company, Defendant-Appellant