DP

Derek Plummer

CL Coal Industry (Patents) Limited: 2 patents #41 of 230Top 20%
Overall (All Time): #2,372,235 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4302054 Cutter unit assemblies for excavating machines and to excavating machines including cutter unit assemblies Francis A. Haskew, Leslie A. Jones, Alan R. Morris, Miklos Tothfalusi 1981-11-24
4229042 Excavating machines 1980-10-21