W.B Bronander Patent Archive - 5 Original Folders- 1940-1949 - Full Sets For Sale

Opposed‑Piston Internal Combustion Engine — original multi‑view piston drawings, mechanical layouts, black‑paper blueprints, full application and correspondence.Cooling‑Fin Structure for Engine — large oversized black‑paper blueprint, fin geometry diagrams, complete application packet and USPTO letters.Wrapping Machine — original mechanical drawings, black‑paper blueprint sheets, full patent application and diagrams.Container Sealing Machine — original prototype photographs of the machine, mechanical drawings, black‑paper blueprints, complete application and correspondence.Label‑Attaching Machine — original drawings, black‑paper blueprint sheets, full application paperwork and diagrams.