| Business | Phone |
| Jung Engineering 4806 Ne Winfield Cir, Lawton 73507 | (580) 351-0071 |
| Robert B Hendrick & Son's Co 904 Sw C Ave, Lawton 73501 | (580) 357-3786 |
| Oklahoma Design Technologies 4539 Ne Bell Ave, Lawton 73507 | (580) 355-1855 |
| Morgan Research Corp 431 Sw C Ave # 203, Lawton 73501 | (580) 353-1750 |
| Landmark Engineering 2505 Ne Skyline Pl, Lawton 73507 | (580) 357-2022 |