On June 23, 1953, Frank Zamboni received U.S. Patent 2,642,679 for the ice resurfacing machine he had built in Paramount, California.

He and his brothers ran the Iceland rink where skaters paid by the hour. Every night the surface had to be restored by hand. Eight men flooded the ice with hoses, scraped it flat with wide blades, and waited for it to freeze solid again. The whole cycle took eight hours and left the ice marked with ridges that caught skate edges.

Frank decided one machine should do the entire job. He wanted it to cut away the old layer, wash the shavings clear, and lay a new sheet of water that would freeze smooth. He started in the workshop behind the rink using a war surplus jeep chassis, lengths of steel pipe, and a blade he cut from a single sheet of metal.

He welded the frame at night after the rink closed. He mounted a gasoline engine to drive the machine and ran rubber hoses that carried heated water from a boiler. The blade assembly sat on a hand crank so one man could raise or lower it while the machine moved. Each test run took place after midnight when the last skater had left.

Early models left streaks of old ice or poured water too fast in some spots and too slow in others. One night the machine sank into a patch of slush it had created and had to be pulled out with ropes and planks. The crew worked until dawn to clear the mess before the morning session opened.

The rink still needed daily resurfacing. Every failed test meant eight hours of extra manual labor the next day and lost revenue from skaters who stayed away from the rough ice. Zamboni felt the weight in his shoulders after each long night of welding and adjusting.

He kept the machine on his own ice and refused to sell it until it worked without fail. Night after night he changed the blade angle by a quarter inch, altered the water pressure, and added a fan to dry the surface. The cycle dropped from eight hours to fifteen minutes and the ice came out flat enough to reflect the lights overhead.

Only then did he accept orders. Buyers came to Paramount and watched the machine run on the rink before they placed their names on a list. The patent recorded the date the tested design could be built for anyone else.

Bob wrote that trust is earned by delivering value first. The pattern holds whether the work is a machine, a service, or a finished product: the buyer must see the result before any agreement is made.

What have you finished and tested all the way through before showing it to anyone?