Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 4493817 | Process for recovering pyrochlore mineral containing niobium and tantalum Niobium and tantalum containing pyrochlore is recovered from high silicate gangue content ore with good selectivity and yield employing collectors of formula ##STR1## wherein R1, R2 and R3 are independently 8 to 16 ca... | 01/15/1985 |
