| •••••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••••••••• | KNOWLES PRECISION DEVICES | Functional Equivalent | Active | |
| •••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••••• | KNOWLES PRECISION DEVICES | Functional Equivalent | Active | |
| ••••••• | KNOWLES PRECISION DEVICES | Functional Equivalent | Active | |
| •••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••• | KNOWLES PRECISION DEVICES | Functional Equivalent | Active | |
| ••••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••••• | KNOWLES PRECISION DEVICES | Functional Equivalent | Active | |
| ••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| ••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |
| •••••••• | MALLORY SONALERT PRODUCTS INC | Functional Equivalent | Obsolete | |