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.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6820417 | Exhaust aftertreatment system and method for an internal combustion engine An exhaust aftertreatment system for use with an internal combustion engine includes at least one leg having a multi-stage NOx adsorber, with each NOx adsorber stage corresponding to a different temperature range of NOx adsorption. In a multi-pass aftertreatment sys... | 11/23/2004 |
| 6668663 | Method and apparatus to determine flow rate with the introduction of ambient air A method of determining a rate of flow of a first gas in a pipe includes placing a flow-restricting device in the pipe such that the device and/or the pipe define a first channel section and a second channel section. The second channel section is disposed... | 12/30/2003 |
| 6579218 | Centrifugal filter utilizing a partial vacuum condition to effect reduced air drag on the centrifuge rotor A centrifuge filter for removing soot from engine oil. The centrifuge filter includes a rotor adapted to be rotated inside a centrifuge housing by an electric motor or other means. The rotor preferably includes a reusable aluminum support casing and a dis... | 06/17/2003 |
| 6517475 | Centrifugal filter for removing soot from engine oil A centrifuge filter for removing soot from engine oil. The centrifuge filter includes a rotor adapted to be rotated inside a centrifuge housing by an electric motor or other means. The rotor preferably includes a reusable aluminum support casing and a dis... | 02/11/2003 |
| 6463157 | Bone conduction speaker and microphone A bone conduction microphone and speaker mountable in contact with a user's head or head area, each utilize a strategically mounted audio transducer that is preferably a piezoelectric ceramic bender. In the case of the speaker, the bender is coupled to an... | 10/08/2002 |
| 6213929 | Motor driven centrifugal filter A centrifugal filter assembly for filtering particulates from engine oil includes a housing with a threaded connector. A filter disposed within the housing is rotatable relative to the housing about an axis of rotation. The filter has an inlet and an outl... | 04/10/2001 |
| 6210311 | Turbine driven centrifugal filter A centrifugal filter assembly for filtering particulates from a fluid includes a rotating filter disposed within a housing and rotatable relative to the housing about an axis of rotation. A turbine is attached to the filter and includes a plurality of tur... | 04/03/2001 |
