first use date

URI: https://gptkb.org/prop/first_use_date
7 triples
GPTKB property
Random triples
Subject Object
gptkb:TM_151 2019-12-01
gptkb:Mark_IV_Tank September 1917
gptkb:Sinopharm December 2020
gptkb:P99_trademark 2019-06-01
gptkb:Enola_Gay 1945-08-06
gptkb:PPK_trademark 2001-05-15
gptkb:Pilot_trademark 1918