Looks like Indusco has control of the Bioshield trademark (same address as Indusco):
Word Mark BIOSHIELD
Goods and Services IC 005. US 006 018 044 046 051 052. G & S: antimicrobial compounds and preparations for treating a variety of surfaces and articles, not for use in the field of animal health and hygiene. FIRST USE: 19960600. FIRST USE IN COMMERCE: 19960600
Mark Drawing Code (1) TYPED DRAWING
Serial Number 75252674
Filing Date March 6, 1997
Current Filing Basis 1A
Original Filing Basis 1A
Published for Opposition July 16, 2002
Registration Number 2629566
Registration Date October 8, 2002
Owner (REGISTRANT) Bio-Shield Technologies, Inc. CORPORATION GEORGIA 1380 W. Marietta Street, N.W. Atlanta GEORGIA 30318
(LAST LISTED OWNER) INHOLD, LLC LTD LIAB CO 2319 JOE BROWN DRIVE GREENSBORO NORTH CAROLINA 27405
Assignment Recorded ASSIGNMENT RECORDED
Attorney of Record James L. Lester
Type of Mark TRADEMARK
Register PRINCIPAL
Live/Dead Indicator LIVE