- Anderson Engineering Corp
- Anderson Engineering Corp
- Beranek Inc
- Beranek Inc
- C H Poland Machine Shop
- C H Poland Machine Shop
- Connolly Products
- Connolly Products
- Copper Products
- Copper Products
- Custom Technology Machining
- Custom Technology Machining
- Custom Technology Machining
- D & J Machine
- D & J Machine
- D & J Machine
- D S Tool Technology
- D S Tool Technology
- D S Tool Technology
- Goeppner Industries Inc
- Gripp Enterprises
- Hermack Machines
- Hugo Engineering
- L B Machine
- London Pride Engineering
- Omicron Engineering Inc
- Ralph E Ames Machineworks
- Ramallo Tool & Die Co
