MARKEY, Chief Judge.
Appeal from an order of the United States District Court for the Eastern District of Missouri granting Hydro-Air Engineering, Inc.'s (Hydro-Air's) motion to quash a subpoena served by Truswal Systems Corp. (Truswal). No. 86 Misc. 178 (E.D.Mo. May 16, 1986). We vacate the order in part and remand.
Background
Truswal owns U.S. Patent Re. 31,807 ('807 patent), entitled "Truss-Web Connectors", issued January 22, 1985 to James...
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