TY - GEN digital ID - 139554409 TI - Patents : Patent-office, March 5, 1811. AU - Thornton, William AU - United States. AU - Gale Cengage Learning PY - 1811 PB - [Washington, D.C. J. Elliott, printer DB - UniCat KW - Patents -- United States UR - https://www.unicat.be/uniCat?func=search&query=sysid:139554409 AB - ER -