There are two lessons to be taught in this blog.
The story is about an experience that I had in the 1960s and 70.
Like nearly all men in those days I shaved every day. The blades I used, both Schick and Gillette, only lasted a few days since they were low quality steel. They were sold in grocery stores and drugstores.
In the early 1960s, around 1964, I learned about a stainless steel blade that was sold by the Wilkinson gardening tool company in gardening shops. I bought some and found that each blade lasted many weeks.... sometimes a month. I told all my friends and before long the Wilkinson steel razor blades had penetrated to 8% of the American blade market. The blades were never available at grocery stores or drugstores. Schick and Gillette kept them out.
How does a company like Schick or Gillette keep a competitive product off the shelves? Simple. They tell the stores and the distributors that no further razors or blades will be available if the Wilkinson blade is sold at that store or that chain.
Kodak did the same thing to Fujifilm in the United States for decades.
Schick and Gillette also mounted large advertising campaigns and introduced their own stainless steel blades.
Lack of management at Wilkinson meant that Wilkinson pulled out of the United States and the company was sold in the 1980s to a subsidiary of Gillette.
There are two points: one is that the government is totally incapable of pursuing anti-monopoly policies when clear monopolistic practice is being carried out. Antitrust was and is the haven of idiots working for the government. Two, the way to enter a new market with a superior product is to distribute in an unconventional channel. In this case gardening stores for a product that should have been in grocery stores and drugstores.