Custom featherlight musical speaker enclosures
US5218176A · kind A · utility
24Cited by
3References
1Claims
0Family size
Inventor
Key dates
| Filing date | Apr 9, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Apr 9, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Lightweight speaker cabinets manufactured from acoustical composite panels having unique acoustical and structural properties, include an acoustical composite laminate consisting of a porous inner core of closed cell rigid urethane foam which is bonded to fiberglass rovings or skin by means of polyester resin and resin tie blocks, interconnecting the exterior and interior roving and core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.