The portability of cellular telephones provides users with the ability to make calls from almost anywhere and Motorola was built on portability. The company made car radios in the 1930s and portable radios called walkie-talkies for the U.S. military during World War Two, and played a major role i
Motorola produced this BPR 2000 model pager around 1982. Prior to the widespread availability of inexpensive cell phones many people carried telephone pagers to stay in contact with work or home. A miniature radio receiver, a pager alerted the user that someone needed to talk to them and provided
Before 1954, so-called portable radio receivers used vacuum tubes to receive and amplify signals. The large batteries needed to power most tubes made radios large and heavy. Receivers built with subminiature tubes existed but were expensive. The invention of transistors in 1947 allowed engineers
Motorola produced the DynaTAC cell phone in 1984 after more than a decade of work in cellular research and technology. The Motorola DynaTAC (an abbreviation of Dynamic Adaptive Total Area Coverage) was the first commercially available portable handheld cell phone. The phone was a 9-inches tall, w
John H. Irwin received patent number 35,158 on May 6, 1862, of this design of a coil oil lamp. Irwin’s lamp was designed for coal oils and other similar hydrocarbons (such as kerosene) which volatilized at low temperatures and required an excess of oxygen to support illumination. The excess of
The Museum’s Textile Collection contains over four thousand patent models. The collection includes many examples of carding machines, spinning machines, knitting machines, rope making machines, looms, baskets, carpets, fabrics, and sewing machines. Even the simple clothespin is well represented
While there are many successful paths to launch a new product, there are also a few ways to fail. As the owner of a popular American candy company, you will need to make careful choices to help your product succeed in the Chinese market.
Drawing on Takaki's vast array of primary sources, and staying true to his own words whenever possible, A Different Mirror for Young People brings ethnic history alive through the words of people, including teenagers, who recorded their experiences in letters, diaries, and poems. Like Zinn's A Peopl
Japanese Americans reflect on their years spent in internment camps as children or young adults. They discuss the process of being forced from their homes, and their ability to make the prisons more livable despite oppressive conditions.
A picture book about the life of Florence Nightingale, a nurse who was dedicated to making hospitals clean and efficient. Through her life's work, she helped to make nursing an important and respected profession.