73273583
Aug 11, 1980
Sep 14, 1982
Elastic Shaped Articles of Synthetic Plastic Material-Namely, Membranes, Seats and Plungers for Use in Pumps and Valves
MachineryElastic Shaped Articles of Synthetic Plastic Material-Namely, Membranes, Seats and Plungers for Use in Measuring and Regulating Apparatuses
Electrical and Scientific Apparatus