Second annual report of the controller general of patents, designs & trade marks under section 155 of the patents act ,1970(39 of 1970) for year 1973-74 - INDIA, PATENTS, DESIGNS AND TRADE MARKS (Controller general of--PATENTS ACT,1970; INDIA, PATENTS, DESIGNS AND TRADE MARKS (Controller general of--PATENTS ACT,1970 (s.l s.n., 1974)