Sentences with phrase «invention of the flashlight»
The sound of water dripping from the ceiling and your own heartbeat in the pitch blackness and stillness of the cave makes you really appreciate the invention of the flashlight and a guide who can find his way out of the cave.
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There have been many cases in the courts (e.g., improvements in telephones, tires, fluorescent lamps, flashlight bulbs) in which changes that would have greatly lengthened the life or quality of an article were withheld to promote replacement sales.11 Often patents have been taken out on superior inventions but not used, so that the improvements were completely suppressed and an outmoded product continued.