- 1Reference: SP7/3/2
Title: Assignment of letters patent from John Charles Raymond Okes concerning ‘improvements in hot air engi...
Level of description: item
Date Free Text: 28 May 1887 – 1902
Production date: From: 1887 To: 1902 - 2Reference: Z1352/7/3/1
Title: Photocopy of AD 1886 5th August No 10,034 complete specification. John Charles Raymond Okes concern...
Level of description: item
Date Free Text: 1886
Production date: From: 1886 To: 1886