FIELD SYSTEMS RESEARCH - PATENT AND TRADEMARK INFORMATION
The following FIELD SYSTEMS RESEARCH (“FSR”) products are protected by patents in the U.S. This website
is provided to satisfy the virtual patent marking provisions of various jurisdictions including the virtual
patent marking provisions of the America Invents Act. The following list of products may not be all inclusive,
and other FIELD SYSTEMS RESEARCH products not listed here may be protected by one or more patents or patents
that are currently pending.
"Air-Lock" Trapped Air indicator and slit screw attachment system:
UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
“Depth Skru” Magnetic Weight system and slit screw attachment system:
UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
“Depth Skru” adjustable, valved balloon indicator system and slit screw attaching system:
UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
“Depth Skru” inflation bottle with threaded valve post and deflating needle:
UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
Any other items that can be attached to a fishing line using the slit screw method not limited to all other
sorts of indicators, weights, flasher, beads, etc.
UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
Additionally, FSR’s patents, and patents pending, include other variations of a screw, magnet and snap-type line
attachers for all of the above mentioned fishing accessories.
Cover page from FSR’s patent covering the slit screw method
and some of the items that can be attached
The popular Air-Lock indicator that is “hooking" fly fishers around the globe
FSR’s amazing magnetic weight system that also utilizes the slit screw attacher
The intricate and functional valved-balloon indicator
"Air-Lock" Trapped Air indicator and slit screw attachment system:
UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
“Depth Skru” Magnetic Weight system and slit screw attachment system: UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
“Depth Skru” adjustable, valved balloon indicator system and slit screw attaching system: UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
“Depth Skru” inflation bottle with threaded valve post and deflating needle: UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
Any other items that can be attached to a fishing line using the slit screw method not limited to all other
sorts of indicators, weights, flasher, beads, etc. UNITED STATES PATENT NO. 8,950,107 AND PATENT PENDING
Additionally, FSR’s patents, and patents pending, include other variations of a screw, magnet and snap-type line
attachers for all of the above mentioned fishing accessories.
Cover page from FSR’s patent covering the slit screw method
and some of the items that can be attached
The popular Air-Lock indicator that is “hooking" fly fishers around the globe
FSR’s amazing magnetic weight system that also utilizes the slit screw attacher
The intricate and functional valved-balloon indicator