Portland Public Library
Patents
Type
http://bibfra.me/vocab/lite/Form
Label
Patents
Name
Patents
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1
Genre of
2
Foreign patenting behavior of small and large firms, an update, by Mary Ellen Mogee
Earmuffs for everyone!, how Chester Greenwood became known as the inventor of earmuffs, by Meghan McCarthy
Sub focus of
4
Harvesting machinery -- Patents
Planing-machines -- Patents
Telephone -- Patents
High technology -- United States -- Patents
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