Description16mm silver microfilm reel of Patent Search Reports from 1991.jpg
English: EP 1991-216 European Patent Office Applications: A3 Search Reports Mar 20 - Apr 3, 1991.
Published by Research Publications in 1992.
This microfilm reel is diazo on polyester base. It was copied from the original silver-halide reel published by Research Publications (a major micropublisher) and held by Shanghai Library. Purchased second hand on antiquarian book market and photographed by me.
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