Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
Inventor
active
Acoustic tree and wooden member imaging apparatus
Optical terpolymer of polyisocyanate, polythiol and polyene mono
Optical terpolymer of polyisocyanate, polythiol and polyene...
Optical thermoplastic thiourethane-urethane copolymers
Process method optical thermoplastic urethane resin lens and...
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