The carbon dioxide gas given ____ by the fermenting vat was known as "fixed air".

The invention of printing on paper provided a technology ____ which information could be stored over the long term.

The key ____ inventive success often requires being in the right place at the right time.

A patent invention is protected by law ____ only particular people or companies have the right to make or sell it.

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In 1886 in the United States, a pharmacist named Dr. John Pemberton tried to invent a medicine because he wanted a cure for ____.

Ever since the first prehistoric stone tools, ____ have lived in a world shaped by invention.

Inventor, a person who brings ideas or objects together in a novel way to create an invention, something that did not exist before.

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Both inventors and engineers look for ways to improve things in areas like health, food, safety, transportation, aerospace, electronics, ____, and the environment.

The bicycle as we know it today was originally developed as the "safety bicycle", because other bikes ____ were extremely dangerous.

It is the classical Athenians who can probably lay claim ____ the invention of commercial advertising as we know it today.

The late 1800s and early 1900s ____ excitement over a wide array of inventions and developments.

The European Patent Convention, which was implemented in 1977, created a European Patent Office that can issue ____ European patent.

Some inventions make bigger impact on the public than ____, and some inventions quickly become part of everyday life.

An invention developed ____ one purpose will sometimes find use in entirely different circumstances.

The first American ____ the propelling of a boat by steam was William Henry, a gunsmith of Lancaster, Pennsylvania.

Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s)

It was not until 1959, twenty-one years after Carlson invented xerography, that the first convenient office copier using xerography was unveiled.