4. E - Fixed Constructions
  5. 21
  6. F

Mine roof support equipment

E - Fixed Constructions – 21 – F

Patent

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E21F 15/04 (2006.01) E21D 19/02 (2006.01) E21D 23/04 (2006.01)

Patent

CA 992336

Evans Frank

E - Fixed Constructions – 21 – F
Inventor

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Gillard Dennis A.

E - Fixed Constructions – 21 – F
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Coal Industry (patents) Limited

D - Textiles – Paper – 06 – B
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