Reference Material Links:

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https://patents.google.com/advanced

 

https://chroniclingamerica.loc.gov/

 

https://www.google.com/?safe=active&ssui=onhttps://chroniclingamerica.loc.gov/https://www.google.com/search?rlz=1CAACAG_enUS766US769&biw=1366&bih=629&tbm=isch&sa=1&ei=AeOeWp7nFoX5_Ab-_LcI&q=2018+case+ih+combine&oq=2018+case+ih+combin&gs_l=psy-ab.1.0.0.5714.7191.0.8847.17.11.0.0.0.0.111.646.10j1.11.0....0...1c.1.64.psy-ab..12.1.109....0.2RKUzQtDS0I&safe=active&ssui=on#imgrc=j2EE4wVZirkFYM: