LAYMAN E. ALLEN, DOING BUSINESS AS WFF 'N PROOF Trademarks
WFF
Filed: February 26, 1963
EQUIPMENT (OR APPARATUS) SOLD AS A UNIT FOR PLAYING A MATHEMATICAL LOGIC EDUCATIONAL GAME
Owned by: LAYMAN E. ALLEN, DOING BUSINESS AS WFF 'N PROOF
Serial Number: 72163456
EQUATIONS
Filed: September 17, 1963
EQUIPMENT (OR APPARATUS) SOLD AS A UNIT FOR PLAYING EDUCATIONAL GAMES AND FOR USE IN TEACHING MATHEMATICS
Owned by: LAYMAN E. ALLEN, DOING BUSINESS AS WFF 'N PROOF
Serial Number: 72177138
