系爭專利
本案 (Pfizer, Inc. v. Apotex, Inc) 系爭專利為美國專利第4,879,303號 ('303專利)。'303專利的前3項請求項如下:
The besylate salt of amlodipine.
A pharmaceutical composition comprising an antihypertensive, antiischaemic or angina-alleviating effective amount of the besylate salt of amlodipine as claimed in claim 1 ...