| Number | Name | Date | Kind |
|---|---|---|---|
| D340930 | Christie | Nov 1993 | |
| D348267 | Yurkonis et al. | Jun 1994 | |
| D352287 | Yamamoto | Nov 1994 | |
| 3180447 | Huff et al. | Apr 1965 | |
| 4870691 | Mindel | Sep 1989 |
| Entry |
|---|
| How to Place Your Speakers, Boston Acoustics/Lucas Film THX Home Theater Speaker System, Catalog #42-468-1, 1993, pp. 7-8. |