Step Technologies Inc.
14Patents
0Active
14Granted
26Portfolio score
Filing activity: Nov 5, 2002 → Apr 15, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7006654B2 | Push-pull electromagnetic transducer with increased Xmax | Electricity | 18 | Expired |
| US6940992B2 | Push-push multiple magnetic air gap transducer | Electricity | 16 | Expired |
| US7181039B2 | Thermal chimney equipped audio speaker cabinet | Electricity | 12 | Expired |
| US7065225B2 | Electromagnetic transducer having a low reluctance return path | Electricity | 10 | Expired |
| US7031487B2 | Tabbed speaker frame with oversized diaphragm | Electricity | 9 | Expired |
| US7477757B2 | Dual-gap transducer with radially-charged magnet | Electricity | 6 | Expired |
| US7227970B2 | Shorting ring fixture for electromagnetic transducer | Electricity | 5 | Expired |
| US6917690B2 | Electromagnetic transducer having multiple magnetic air gaps whose magnetic flux is in a same direction | Electricity | 4 | Expired |
| US7457429B2 | Laminated motor structure for electromagnetic transducer | Electricity | 3 | Expired |
| US6996247B2 | Push-push multiple magnetic air gap transducer | Electricity | 3 | Expired |
| US7233681B2 | Electromagnetic transducer with eccentrically mounted voice coil former | Electricity | 3 | Expired |
| US7177440B2 | Electromagnetic transducer with asymmetric diaphragm | Electricity | 2 | Expired |
| US7270215B2 | Loudspeaker enclosure with damping material laminated within internal shearing brace | Electricity | 2 | Expired |
| US7492918B2 | Audio speaker with graduated voice coil windings | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.