Who discovered the star screw head?

Who discovered the star screw head?

The history of the screw dates back to BC. But it was necessary to wait for the 1930s to open the head of the screw in the form of a cross and in this way to make the screw work more easily.

Who Invented the Cat's Eye?

Who Invented the Cat's Eye?

Percy Shaw, OBE (15 April 1890 – 1 September 1976) was an English inventor and businessman. He patented the reflective road stud or "cat's eye" in 1934, and set up a company to manufacture his invention in 1935.

How has Letgo managed to grow?

How has Letgo managed to grow?

The application, in which second-hand goods are traded, attracted more attention than expected. Cleverly designed advertisements also contributed to the spread of the application.

Who invented the self-cleaning window?

Who invented the self-cleaning window?

The self-cleaning window may at first be seen as a useless, futile invention. Although the innovative technologies used behind this invention are important, how many of us wonder how clean our windows are?