punched in top of caster of front left wheel: BASSICK punched in right side of caster of front left wheel: PAT NO. 1914204 punched in top of caster of front right wheel: BASSICK punched in right side of caster of front right wheel: PAT NO. 1914204 punched in top of caster of rear left wheel: BASSICK punched in right side of caster of rear left wheel: PAT NO. 1914204 punched in top of caster of rear right wheel: BASSICK punched in right side of caster of rear right wheel: PAT NO. 1914204