Below is Rommy Revson’s original design for the scrunchie. (Image courtesy of the U.S. Patent and Trademark Office)
Google offers a patent search, which offers an insight into thousands of patents, many accompanied with quirky diagrams. Below shows the 'Method of concealing partial baldness' using only the hair on a person's head, 'invented' by Donald and Frank Smith.
Browsing through patents, it's facinating to see how certain products have evolved over the years, notably, the humble paperclip.
The modern paper clip (636,272) was patented in 1899 to William D. Middlebrook of Connecticut but prior to this invention were many attempts to create a simple paper fastening device. Below are a few personal highlights:
Samufc B. Fay's Ticket Fastener, 64088 (1867)
Smith & Sawyer's Paper Clip, D7510 (1874)
Edward. D Rockwell's Paper Clip, 426216 (1890)
Edward. D Rockwell's Paper Clip, 443210 (1890)
George. P Farmer's Paper Clip, 513772 (1894)
Mathew Schooley's Paper Clip, 601384 (1898)
Later, more elaborate designs by Harold A. Wright, 674290 (1901)