# US 8,464,700 B2 · Bowfishing method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,700 B2 - Document ID: US8464700B2 - Status: Granted - Kind: B2 - Application number: 12/858,580 - Filed: 2010-08-18 - Published: 2012-02-23 - Granted: 2013-06-18 - Earliest claimed: 2010-08-18 - Assignees: Kinsey Archery Products, Inc. - Applicants: Matthew R. Smith; Dave B. Parker - Inventors: Matthew R. Smith; Dave B. Parker - Web page: https://patentgrep.com/patent/US8464700B2 ## CPC - F41G 1/467: for bows - F41G: WEAPON SIGHTS; AIMING (optical aspects thereof G02B) ## Abstract The present invention relates to a bowfishing method, bowfishing system and laser bowfishing sight for targeting and illuminating an underwater target. The position of the target is compensated for the refraction of light in the practice of the method and sighting in of the system of the present invention. The laser bowfishing sight includes a rotational adjustment for compensating for the refraction of light. ## Claims ### Claim 1 A method of targeting an arrow on an underwater target with a laser sight, comprising the steps of: providing a bow; providing the laser sight attached to the bow, wherein the laser sight further comprises: a laser; a switch for activating the laser; and an attachment device for releasably attaching the laser bowfishing sight to the bow; wherein the attachment device comprises a base portion and an adjustment portion attached at an attachment point; wherein the attachment device is configured to adjust the linear distance of the laser from the attachment point; and wherein the attachment device is configured to rotate the laser about the attachment point through a vertical plane; activating the laser with the switch to project a laser beam; illuminating a target located below a water surface with the laser beam, a path of the laser beam to the underwater target being non-linear due to refraction of the laser beam; adjusting the trajectory of the arrow by an offset angle to compensate for the refraction of the laser beam, the offset angle being the angle of refraction of light passing from air into water; and launching the arrow from the bow in a straight line at the illuminated, underwater target. ### Claim 2 (depends on 1) The method of claim 1, further comprising: determining the offset angle of the trajectory of the arrow from a point that the laser illuminates a known target position at a proximate target distance and depth below the water surface; and adjusting the trajectory of the arrow to compensate for the offset angle and proximate depth below the water surface. ### Claim 3 (depends on 1) The method of claim 1, wherein the laser is selected from a group consisting of a green laser, a red laser and a blue laser. ### Claim 4 (depends on 1) The method of claim 1, wherein the laser is a green laser. ### Claim 5 (depends on 1) The method of claim 1, wherein the laser has a power output of about 1 to about 30 mW. ### Claim 6 (depends on 1) The method of claim 1, wherein the laser is a green laser having a power output of about 5 mW. ### Claim 7 (depends on 1) The method of claim 1, wherein the laser is controlled by a pressure switch. ### Claim 8 A bowfishing system, comprising: a bow; and a laser sight attached to the bow; wherein the laser sight comprises: a laser; a switch for activating the laser; a retrieval system attached to the bow that includes a spool, a housing, a line; and an attachment device for releasably attaching the laser bowfishing sight to the bow; and wherein the attachment device comprises a base portion having an opening, an extension portion and an adjustment portion including an attachment portion, the extension portion further including a shaft received through the opening in the base portion, the shaft releasably attached to the attachment portion to reposition the laser in one or more of an X, Y and Z direction. ### Claim 9 (depends on 8) The system of claim 8, wherein the base portion further includes one or more attachment points for removably fastening the attachment device to a bow. ### Claim 10 (depends on 8) The system of claim 8, wherein the laser is selected from a group consisting of a green laser, a red laser and a blue laser. ### Claim 11 (depends on 8) The system of claim 8, wherein the laser is a green laser. ### Claim 12 (depends on 8) The system of claim 8, wherein the laser has a power output of about 1 mW to about 30 mW. ### Claim 13 (depends on 8) The system of claim 8, wherein the laser is a green laser having a power output of about 5 mW. ### Claim 14 (depends on 8) The system of claim 8, wherein the switch is a pressure switch. ### Claim 15 A laser bowfishing sight, comprising: a laser; a switch for activating the laser to project a laser beam; and an attachment device for releasably attaching the laser to a bow, the attachment device comprising a base portion and an adjustment portion attached at an attachment point to the base portion for releasably attaching the laser bowfishing sight to a bow; wherein the attachment device is configured to adjust the linear distance of the laser from the attachment point; and wherein the attachment device is configured to rotate the projected laser beam about the attachment point through a vertical plane. ### Claim 16 (depends on 15) The laser bowfishing sight of claim 15, wherein the base portion includes one or more attachment points for removably fastening the attachment device to a bow. ### Claim 17 (depends on 15) The laser bowfishing sight of claim 15, wherein the laser is selected from the group consisting of a red laser, a blue laser, and a green laser. ### Claim 18 (depends on 15) The laser bowfishing sight of claim 15, wherein the laser has a power output of between about 1 mW to about 30 mW. ### Claim 19 (depends on 15) The laser bowfishing sight of claim 15, wherein the laser is a green laser having a power output of about 5 mW. ### Claim 20 (depends on 15) The laser bowfishing sight of claim 15, wherein the switch is a pressure switch.