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Propeller Safety Inventions

Reduce Peak Impact Force of Boat Propeller Guards

This Tech Brief explains a method that may reduce maximum impact force of some boat propeller guards striking people. This method may also: Reduce injuries caused by striking some boat propeller guards at lower speeds. Allow some propeller guards to be operated at higher speeds while causing less severe injuries to people in the water. […]

Prevent Unauthorized Operation of Rental Boats Invention

Our invention eliminates / stops / prevents unauthorized individuals from operating rental boats during the rental period, sometimes called nonauthorized operation The disclosure below of our invention to Prevent Non-Authorized Operation of Rental Boats was posted on February 8, 2022. We will make no changes to the text below the line following this paragraph except […]

Analyzing Boat Acceleration & Boat Coast Down Data

This paper develops a new mathematical model for how boats accelerate during a high speed test run. The process divides a top speed run into two segments, namely a displacement segment and a planing segment. The equation only requires three coefficients for each segment. Each coefficient is independent of the others. Additionally, each coefficient has […]

Log strike impact mapping / charting invention

Our Log strike impact mapping / charting invention disclosure below was posted on 2 March 2019. We will make no changes to the text below the line following this paragraph except to correct misspellings, punctuation, and to update html/computer codes and links. Any updates to the invention will be posted below the invention disclosure. Log […]

Boat Intelligent Warning System Invention

Our Boat Intelligent Warning System (BIWS) invention disclosure below was posted on 29 November 2012. We will make no changes to the text below the line following this paragraph except to correct misspellings, punctuation, and to update html/computer codes and links. Any updates to the invention will be posted below the invention disclosure. Boat Intelligent […]

Detecting People Near Boats More Reliably Using Optical Image Stabilization: An Invention

Our Detecting People Near Boats More Reliably Using Optical Image Stabilization invention disclosure below was posted on 19 September 2012. We will make no changes to the text below the line following this paragraph except to correct misspellings, punctuation, and to update html/computer codes and links. Any updates to the invention will be posted below […]

RFID Boat Kill Switches (Engine Cut-Off Switches) – Five PGIC Invention Disclosures Posted August 29, 2011

Today, August 29, 2011, we, the Propeller Guard Information Center, posted five RFID (Radio Frequency Identification) invention disclosures. While they have other implications as well, they were primarily inspired by problems surrounding boat engine kill switches (emergency engine cut-off switches). We (Polson Enterprises and the Propeller Guard Information Center) initially retained all rights to these […]

Boat Engine Kill Switch System for Integrating With RFID Tags or RF Reflectors invention

Our Boat Engine Kill Switch System for Integrating With RFID Tags or RF Reflectors Invention disclosure below was posted on 29 August 2011. It is one of five related Radio Frequency Identification (RFID) invention disclosures we posted today. We will make no changes to the invention disclosure that begins with text below the horizontal line […]

RFID Life Jacket / PFD Used to Detect Human Presence in Boat Kill Switch Applications invention

Our RFID Life Jacket / RF Reflector Life Jacket Used to Detect Human Presence in Boat Kill Switch Applications invention disclosure below was posted on 29 August 2011. It is one of five related Radio Frequency Identification (RFID) invention disclosures we posted today. We will make no changes to the invention disclosure that begins with […]

RFID Clothing Used to Detect Human Presence in Boat Kill Switch Applications invention

Our RFID Clothing Used to Detect Human Presence in Boat Kill Switch Applications invention disclosure below was posted on 29 August 2011. It is one of five related Radio Frequency Identification (RFID) invention disclosures we posted today. We will make no changes to the invention disclosure that begins with text below the horizontal line following […]