| Business | Phone |
| Cemco Reactors 8242 S Sandusky Ave, Tulsa 74137 | (918) 743-2489 |
| Crane Manufacturing Inc 5531 E Admiral Pl, Tulsa 74115 | (918) 838-8800 |
| Geophysical Research Corp 6540 E Apache St, Tulsa 74115 | (918) 834-9600 |
| Kenco Engineering Co 10105 E 55th Pl, Tulsa 74146 | (918) 663-4406 |
| W L Walker Co 1009 S Main St, Tulsa 74119 | (918) 583-3109 |