Umbrella's for example see continuous evolution in means of making better fully collapsible versions, making the deployment more automated, reducing weight, etc.
From Wikipedia, illustrating both that there's continued substantial effort in coming up with new ideas, and at the same time that it is hard to come up with something genuinely new:
> Umbrellas continue to be actively developed. In the US, so many umbrella-related patents are being filed that the U.S. Patent Office employs four full-time examiners to assess them. As of 2008, the office registered 3000 active patents on umbrella-related inventions. Nonetheless, Totes, the largest American umbrella producer, has stopped accepting unsolicited proposals. Its director of umbrella development was reported as saying that while umbrellas are so ordinary that everyone thinks about them, "it's difficult to come up with an umbrella idea that hasn’t already been done."[36]
