William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7225639 | Expandable ring design and method for making same An expandable jewelry ring. The ring has a split circular spring made of springy metal and having first and second ends separated by a gap. A tongue portion extends from the first end of the spring and into the gap. A mounting is made of metal and has a generally sp... | 06/05/2007 |
| 7210313 | Release mechanism for a bangle A bangle includes first and second bangle members, each having a proximal end and a distal end. The distal end of the first bangle member is pivotally connected to the distal end of the second bangle member to permit relative movement between the first and second ba... | 05/01/2007 |
| 7169213 | Multi-channel cross-flow porous device A multi-channel modular device (10) processes between two fluid streams of different compositions. The device (10) includes a porous body (150) having a first plurality of feed-flow pathways (110) disposed in the body (150) for tra... | 01/30/2007 |
| 5748571 | Plastic top shell A plastic top shell for use on a metallic top link of an expansible watch band, the top link having a hollow box-like configuration with open ends and with top and bottom walls joined by side walls. The plastic top shell comprises a molded body having a t... | 05/05/1998 |
| 5623838 | Adjustable link for chain link bracelet An adjustable link (1) for a bracelet having a plurality of fixed links comprises a cap (6) into which a base (7) slides and a mechanism (8) with push-pieces (9, 10) which enables the length of the link to be extended to at least two different lengths so ... | 04/29/1997 |
| 5272795 | Jewelry clasp Jewelry clasp comprising a male clasp member functioning as a leaf spring and a female clasp member to receive the leaf spring and be locked in place when fully inserted; and to be unlocked by manual finger pressure against the leaf spring device by acces... | 12/28/1993 |