Patent drawings for a wheel showing close-up of the spoke hooks on the rim.

Patent drawings for a wheel showing close-up of the spoke hooks on the rim.

Wheelchair technology

Four patent drawings entitled "Vehicle-wheels". 1 is side view of a wheel showing spokes and the wheel rim. 2 is close-up of the spoke hook on the rims. 3 and 4 focus on the spokes

Peter Gendron

United States Patent and Trademark Office, Office of Data Management, Patent Full-Text and Image Database, Patent No. 150,02. http://pdfpiw.uspto.gov/.piw?Docid=00150021&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D0150021.PN.%2526OS%3DPN%2F0150021%2526RS%3DPN%2F0150021&PageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page

Carleton University Disability Research Group

April 21, 1874

public domain

Jpeg of digitized document

Document

USTPO_150021_1.4a

United States, 1874