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Pneumatic tubes for moving documents and postal items continue to be used alongside email, especially where quick transportation of a specific copy of a document or small package is needed, such as in hospitals or banks. Pneumatic tubes for passenger transport have been used in atmospheric railway to provide motive power, like a cable car system.
Merton contrasted a "multiple" with a "singleton"—a discovery that has been made uniquely by a single scientist or group of scientists working together. [5] The distinction may blur as science becomes increasingly collaborative. [6] A distinction is drawn between a discovery and an invention, as discussed for example by Bolesław Prus. [7]
List of former trademarks that have been genericized [ edit ] The following partial list contains marks which were originally legally protected trademarks , but which have subsequently lost legal protection as trademarks by becoming the common name of the relevant product or service, as used both by the consuming public and commercial competitors.
2600 BC: Balance weights and scales, from the Fourth Dynasty of Egypt; examples of Deben (unit) balance weights, from reign of Sneferu (c. 2600 BC) have been attributed. [175] 2556 BC: Docks structure in Wadi al-Jarf, Egypt, which was developed by the reign of the Pharaoh Khufu. [176] [163] [d] 2500 BC: Puppetry in the Indus Valley. [183] [184]
The scope of what facts should be included is subject to ongoing debate and discussion, and evolves and develops on a constant basis. Some guidelines have been defined through public debate, others simply through habit and general usage. For example, not every fact that pertains to general U.S. governmental processes may be included here.
[1] [2] The large decline in imports in 2020 has been attributed to the effects of COVID-19 pandemic. [3] Some key highlights of the 2020 data are: Imports of goods decreased $166.2 billion to $2,350.6 billion in 2020. [1] [2] Automotive vehicles, parts, and engines decreased $65.2 billion. Passenger cars decreased $33.4 billion.
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The Joint Code of Practice provides advice on how to prevent fires such as through the use of flame-retardant temporary protection materials: for example, some high quality floor protectors are designed to burn slowly and prevent the spread of fires.