====== Patent FX-6844.5: 1831-11-20, Propeller Screw ======

^ X Number      ^ Date       ^ Inventor       ^ City             ^ Title  ^ Status ^
| FX-6844.5       | 1831-11-20 | Benjamin M. Smith | Rochester, NY | Propeller Screw | Recovered |

===== Comments =====

FX patents are fractional X patents. This patent is #2267 1/2. 

Only about 2,000 of the almost 10,000 X-patent documents were recovered. 



Because of the Patent Office fire in Dec. 1836, little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.

===== Information Sources =====

(To be filled in.)
    

===== External links =====
[[http://pdfpiw.uspto.gov/.piw?PageNum=0&idkey=NONE&SectionNum=3&HomeUrl=&docid=X006844H|USPTO pdf]]