Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7410252 | Spectacle frames There is provided a spectacle frame comprising: a front for holding therein two lenses; the front having front end pieces extending rearward at each end thereof, each front end piece having an upper portion and a lower portion; and one of the upper portion and the l... | 08/12/2008 |
| 5614965 | Spectacle frames In spectacle frames having exchangeable edge bars (10) of the type that by one end is fastened by an engagement with the bridge (2) the edge bar is retained at its far end by a fixing member (16) in the form of a pin or rivet cooperating with a hole, said... | 03/25/1997 |
| 5523806 | Eyeglasses having improved lens fastening member To avoid excessive stressing of lenses and still facilitate the attaching and removing of the lens to the rim, a pair of eyeglasses has an improved rim lock member. The rim lock member has a two-parallel wire arrangement and a metal piece slidably movable... | 06/04/1996 |
