Complex sentence: Edward George Bowen, developer of the first airborne radar systems, was also at the 20 December meeting, and stated that he was aware of similar work in the UK, but didn't know enough about it to offer any suggestions.
Split into simpler sentences: Edward George Bowen, developer of the first airborne radar systems, was also at the 20 December meeting. He stated that he was aware of similar work in the UK, but didn't know enough about it to offer any suggestions.