U.S. federal trademark · Serial No. 73498439 · Reg. No. 1430889
LENS, MIRROR OR MAGNIFYING GLASS, CONSISTING OF RIGID INTERFITTING THREADED SLEEVES WITH RESILIENT OPTICAL DIAPHRAGM ELEMENTS AT EACH END, WHOSE FOCAL LENGTH IS CAPABLE OF BEING MANUALLY ADJUSTED OVER A CONTINUOUS RANGE, FOR USE IN DEMONSTRATING AND/OR TESTING OPTICAL PRINCIPALS IN EDUCATION
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.