| •••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| ••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| •••••••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |
| ••••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |
| •••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |
| •••••• | TDK CORP | Functional Equivalent | Other | |
| •••••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Active | |
| •••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Active | |
| ••••••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |
| •••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| ••••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| •••••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |
| •••••••••• | TDK CORP | Functional Equivalent | Obsolete | |
| ••••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| •••••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| •••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| ••••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| ••••••••••• | KOA SPEER ELECTRONICS INC | Functional Equivalent | Obsolete | |
| ••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |
| •••••••••• | STETRON INTERNATIONAL INC | Functional Equivalent | Obsolete | |