Today in Heritage History, 1836, the U.S. Patent Office in Washington, D.C., burns to the ground. Ironically, for six years prior to the event the Office had been working “diligently to process” the necessary paperwork to approve  submitted patents for indoor fire extinguishers and building sprinkler systems. The applications were (of course) lost in the fire requiring the applicants to re-apply. Application’s were still pending approval in 1871, when THE WHOLE FUCKING CITY of Chicago burned to the ground.