1. Wm. Shakespeare. Romeo and Juliet, II ii.
2. Diamond v. Chakrabarty, U.S Patents Quarterly 206, 193–202 (1980).
3. General statements about patent law in this publication refer to the law of the United States and the EPO in 1989. Every country that grants patents has its own patent statutes, which are amended from time to time. Even the member countries of the European Patent Convention reserve the right to interpret patents granted by the European Patent Office differently during litigation. Interpretation of a patent claim should always take into account the law of the issuing country at the appropriate time.
4. US 3,236,857. Assigned to Boehringer Ingelheim G.m.b.H. by K. Zeile, K. H. Hauptmann and H. Stahle. Published Feb. 22,1966. Filed Dec. 3, 1963, as a continuation-in-part of an application filed Oct. 1,1962, claiming German priority of Oct. 9,1961. Expired.
5. In re Vogel and Vogel, U.S Patents Quarterly 164. 619–23(1970).