| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Belgium | 1 | |
| #3 | Canada | 1 | |
| #4 | Germany | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Frames | |
| #3 | Unspecified technologies | |
| #4 | Vehicle parts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Croup Robert E | 5 |
| #2 | Everitt Scott F | 2 |
| #3 | Everitt S | 2 |
| #4 | Croup R | 1 |
| #5 | Strawn A | 1 |
| #6 | Everitt S F | 1 |
| #7 | Vermeren Joseph P | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4178473A | Two-way loudspeaker for vehicle | |
| US4122911A | Loudspeaker assembly | |
| US4071111A | Weatherproof loudspeaker assembly and method of making same | |
| US3993345A | Enclosure for automobile trunk-mounted loudspeaker | |
| US4019708A | Latchable swivel mount for loudspeaker | |
| US3941207A | Loudspeaker assembly | |
| US3749198A | Sound reproduction system | |
| US3757889A | Sound reproduction system |