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Patent Analysis: Joseph Glidden
Patent Analysis: Joseph Glidden's Barbed Wire

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Patent Analysis: Lizzie Magie
Patent Analysis: Lizzie Magie's Board Game

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Patent Analysis: Marjorie S. Joyner’s Permanent Wave Machine
Patent Analysis: Marjorie S. Joyner’s Permanent Wave Machine

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Patent Analysis: Thomas Edison
Patent Analysis: Thomas Edison's Kinetoscope

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Patent Analysis: Willis H. Carrier
Patent Analysis: Willis H. Carrier's Apparatus for Treating Air

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Patent Analysis: Wright Brothers
Patent Analysis: Wright Brothers' Flying Machine

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Pearl Harbor Dispatch Analysis
Pearl Harbor Dispatch Analysis

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Petition Against Annexation of Hawaii
Petition Against Annexation of Hawaii

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Political Cartoon Analysis: No Taxation Without Representation
Political Cartoon Analysis: No Taxation Without Representation

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Ports of Immigration: Angel Island and Ellis Island
Ports of Immigration: Angel Island and Ellis Island

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Mapping History