Patent directory of Sri Lanka Details of inventions patented by Sri Lanka from 1980 upto December 31, 1992 and the list of Sri Lanka's patents granted during year 1993

Patent directory of Sri Lanka Details of inventions patented by Sri Lanka from 1980 upto December 31, 1992 and the list of Sri Lanka's patents granted during year 1993 - Colombo Sri Lanka inventors commission - xxviii,105 p.

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BOOKS BOX 395

B0395 / LDC