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National Patent Development Corp

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Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3941858A Hydrophilic polymers, articles and methods of making same Expired / Lapsed 1973-08-07 1976-03-02 11 Details
US3695921A Method of coating a catheter Expired / Lapsed 1970-09-09 1972-10-03 0 Details
US3255753A Electrical sleep machine and sleep inducing method Expired / Lapsed 1963-03-22 1966-06-14 2 Details