(i.e., not an improvement easily made by someone trained in the relevant area). The invention also must be described in sufficient detail as to enable one skilled in the field to use it for the stated purpose (sometimes called the "enablement" criterion). In general, raw products of ...
This I did constantly until I was about seventeen when my thoughts turned seriously to invention. Then I observed to my delight that I could visualize with the greatest facility. I needed no models, drawings or experiments. I could picture them all as real in my mind. Thus I have been le...
In the 1800s . the gasoline engine was invented . The engine could be placed on carts and used to power them , Mules , horses , and oxen were not needed as much Engines have led to the invention of many other things that help move people and goods from...
There was a moment of salvation when Japan attacked Pearl Harbour and declared war on the Western power. China and its peasant soldiers were needed to open another front to sap the fighting power and resources of the Japanese. A large part of the Japanese Imperial Army was held down in Chin...
that they could fire arrows on the enemy from above. Kites were used to distribute messages of propaganda to the crowds during war, and also to communicate ‘Help needed’ messages. There is even a documentation of a kite exploding in the air, being used to frighten the enemy during war ...
The serrated knife is something you may not even have known you needed, until it was in your life. That was the case in 1919, when Syracuse native Joseph Burns invented it. Synthetic Penicillin Photo by Jan Antonin Kolar on Unsplash
Wing Ding Back Glass: That Doesn’t Look Like a Dust Storm to Me…. I’ve adapted this game play such that the targets and “racking” represent the proactive things that farmers needed to do to improve their chances of saving their farms and surviving the dust storms. ...
根据第一段最后提出的问题“What factors(因素) are needed for their success?”后面紧接着的五段可知一共有五个因素。故选C。【小题2】词义猜测题。题干意为:在最后一段“ignoring ”的意思最有可能是。根据第六段“but both parents and children were more interested in a tennis video game on the ...
Niépce’s first attempt needed 8 hours exposure time—Daguerre’s needed 20 or 30 minutes. Now, of course, we can take photos of anything we want, anytime, instantly. Thank you, Daguerre and Niépce, for your role in making Instagram possible. #nofilter Saxophone Bud Freeman While some ...
was able to breath through a hose connected to a bell, and through two canes attached to a mask. His designs also included a bottle which would allow divers to urinate without having to go above water, and an inflatable balloon, which would help a diver to surface when he needed to. ...