Many might believe the ballmark repair tool in golf falls into that category. After all, it's existed as-is, essentially unchanged, for decades.
Roy Cranman, however, thinks he's built a better mousetrap. Cranman is CEO of Cranman Golf Products, which is producing a ballmark repair tool called the MarkMender that is unlike any you've seen before.
If it works - and early indications are that it does - it might just revolutionize the way golfers catch mice. Um, make that repair the greens.
Traditional repair tools are essentially just levers, usually made of metal, with two prongs. The prongs are inserted into the green around the ballmark, and the tool is pulled up and pressed forward, pushing the edges of the depression toward the center.
Some golfers find the traditional tools unwieldy, even when used correctly, and simply don't take the time to do a good job.
The MarkMender is different. It simply can't be used incorrectly. If you use the MarkMender, there is only one way to do it. Also, in many instances it takes only one pass with the MarkMender to repair the ballmark. No fuss required.
It might take a few attempts to get the hang of it, but once mastered, we discovered, the MarkMender makes repairing ballmarks a snap.
On firmer greens, we discovered and Cranman himself points out, it may take two or more tries to completely repair the ballmark. In such instances, the golfer would simply turn the MarkMender 90 degrees, insert into the ground, and give another squeeze.
The squeezing motion of the MarkMender is one of those ideas that seems obvious ... once someone finally thinks of it. Cranman explained that he was inspired after seeing one of his daughter's hair clips.
Indeed, it is a big problem. A USGA-sponsored study at Rutgers University in 2003 concluded, "Poorly repaired, or not repaired at all, ballmarks are a major factor that limits the quality and playing conditions on putting greens."
Most golfers reached that conclusion a long time ago, even the ones who don't bother to repair their own marks.
"I had a flood of memories of the thousands of admonitions of rangers and memos on scorecards, etc., that asked me to repair my ballmarks," Cranman continued. "Then, as I actually was correctly repairing the very next mark, I thought, why doesn't someone invent a tool that can't be misused?