Mark Identification

PRO-TEK

Serial Number

73243474

Filing Date

Dec 19, 1979

Registration Date

Jul 21, 1981

Trademark by

E. I. DU PONT DE NEMOURS AND COMPANY

Classification Information

Personal Monitoring Badges for Determining Exposure to Airborne Contaminants and Readout Units for Use in Connection Therewith

Electrical and Scientific Apparatus