Inventor

RUSSELL MARTIN J

GB3 patents

⚠️ This page may combine multiple inventors who share the name “RUSSELL MARTIN J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SECR DEFENCE BRIT

2 patents

US5679001AOct 21, 1997

Children's speech training aid

SECR DEFENCE BRIT116 citations94

US5791904AAug 11, 1998

Speech training aid

SECR DEFENCE BRIT55 citations92

HOWELL DAVID N L

1 patent

US5226091AJul 6, 1993

Method and apparatus for capturing information in drawing or writing

HOWELL DAVID N L110 citations88