Griffith, John A. Trademarks
MINI-STIMP
Portable apparatus for measuring the speed of a golf green through a conversion method
Owned by: Griffith, John A.
Serial Number: 78511262
GRIFFMETER
Device for measuring the greenspeed of a golf putting green; Greenspeed is a measure of the rolling resistance of a golf…
Owned by: Griffith, John A.
Serial Number: 78667219
