Hi,

'David Lindsey' is potentially mispelled in Wiki (https://www.schach-computer.info/wik...Lindsey,_David)

He is found as David Lindsay in chessprogramming wiki (https://www.chessprogramming.org/David_Lindsay or https://web.archive.org/web/20180821...avid%20Lindsay)

These could be wrong, but DL is also known as inventor for Boris Diplomat chessmen font, and the patent can be seen here:
http://www.patentbuddy.com/Patent/D255247
Copied from tab 'Publications':
US Patent No: D255247
Chess piece font
Abstract
Not Available
Inventors : Lindsay David (Lewisville, US)
Published Assignee : APPLIED CONCEPTS, INC. (Garland, US)
Current Assignee : APPLIED CONCEPTS, INC. (Garland, US)
Filed : July 31, 1978

I much doubt such a formal patent would mispell the inventor's name!
Kind regards,
Eric