[EDIT] They have at least two generic trademarks, one with matching class.
Class 9 (including electric, measuring): http://trademarks.justia.com/852/58/n-a-85258337.html
Class 16: http://trademarks.justia.com/850/51/n-a-85051489.html
For comparison the less generic Class 9 entry of Fluke: http://trademarks.justia.com/860/76/n-86076075.html & http://trademarks.justia.com/860/76/n-86076086.html
http://trademarkbureau.com/trademark_classes.php
It doesn't seem to stop National Geographic from licensing their logo to optical instrument manufacturer Bresser.
Yellow border on electronic hardware: http://www.bresser.de/publications/national_geo_kat_de_en/HT...
[EDIT] There are some
Class 9 (including electric): http://trademarks.justia.com/852/58/n-a-85258337.html
[EDIT] They have at least two generic trademarks, one with matching class.
Class 9 (including electric, measuring): http://trademarks.justia.com/852/58/n-a-85258337.html
Class 16: http://trademarks.justia.com/850/51/n-a-85051489.html
For comparison the less generic Class 9 entry of Fluke: http://trademarks.justia.com/860/76/n-86076075.html & http://trademarks.justia.com/860/76/n-86076086.html