Electrical and scientific apparatus Trademarks Filed in November 30, 1960
PARABOLAR
Filed: November 30, 1960
Contact Lenses
Owned by: Danker Laboratories, Inc.
Serial Number: 72109303
DIDAK
Filed: November 30, 1960
TEACHING MACHINE
Owned by: RHEEM MANUFACTURING COMPANY
Serial Number: 72109353
