Exhibit A-Drawing of a cement head apparatus sold by Nodeco. |
Exhibit B-Advertising brochure of Halliburton Company, 7-15-81. |
Exhibit C-Two drawings of cementing head apparatus. |
Exhibit D-1982-83 Composite Catalog of Oilfield Equipment & Services, vol. 1, pp. 182 and 1293. |
Exhibit F-Advertisement for rotary drilling swivel manufactured by Gray Tool Company (no publishing date given). |
Exhibit G-Advertising brochure for Roto-Tek cementing system, (no publishing date given). |
Exhibit H-Advertisement for a cementing manifold sold by Lindsey Completion Systems, (no publication date given). |
Exhibit I-Drawing of typical prior art casing swivel used for non-lift-through applications, (no publishing date given). |
Exhibit J-Photocopy of swivel previously used by assignee of present invention. |