I want to give my dad the recognition he deserves, as a LEGO designer in the 80s on the TOWN theme and in the early 90s as the creator/co-creator of the 9V train theme.

He’s also the person behind some of the most used speciality bricks in the last 30 years:
The 1x2 flat tile “the grille” (part 2412a/b)
The 1x2 profile brick (part 2877)
The 2x2 corner plate (part 2420)
The 2x2 corner brick (part 2357)

On part 2412, the grille - he specifically mentions that Godtfred Kirk Christiansen was against the design, seeing as there were no studs on top, but it was approved eventually, mainly due to Kjeld Kirk Kristiansen supporting the design.

After this, he worked on many of the classic Miniland dioramas in LEGOLAND Billund and LEGOLAND Windsor, before departing LEGO and LEGOLAND altogether in the late 90s.