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Stephen R Speer

This inventor holds 15 USPTO granted patents. Top assignees: Nautical Development, Inc., Machen, Inc., Aerostar Marine Corporation. Active years: 1983-1996.

USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 10

Forward Citations = 196(Granted Patents)

Company Filing History:

5 out of 5

Nautical Development, Inc.

Aerostar Marine Corporation

patent

4. 7 out of 834,411

Other

patents

Years Active: 1983-1996

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5549455 - Through the hub exhaust flow improvements for marine variable pitch (1996-08-27),

2. 5368442 - Automatic variable discrete pitch marine propeller (1994-11-29),

3. 5326223 - Automatic variable pitch marine propeller with mechanical holding means (1994-07-05),

4. 5240374 - Damped automatic variable pitch marine propeller (1993-08-31),

5. 5129785 - Automatic variable discrete pitch marine propeller (1992-07-14),

6. 5076220 - Internal combustion engine (1991-12-31),

7. 5032057 - Automatic variable pitch marine propeller (1991-07-16),

8. 5012646 - Turbine engine having combustor air precooler (1991-05-07),

9. 4947806 - Engine breather oil recovery system (1990-08-14),

10. 4929153 - Self-actuating variable pitch marine propeller (1990-05-29),

11. 4483147 - Turbocharged engine having an engine speed and throttle position (1984-11-20),

12. 4469078 - Aircraft engine-turbocharger package with bleed valve control (1984-09-04),

13. 4428550 - Vibration-insulating stability improving torque force device (1984-01-31),

14. 4424781 - Modified control linkage for supercharged inlet air to internal (1984-01-10),

15. 4399665 - Aircraft air conditioning system (1983-08-23),

Title: The Innovative Contributions of Stephen R Speer

Introduction

Stephen R Speer is a notable inventor based in Spokane, WA (US), recognized for his significant contributions to marine technology. With a total of 15 patents to his name, Speer has developed innovative solutions that enhance the performance and efficiency of marine propellers.

Latest Patents

Among his latest inventions is the "Through the Hub Exhaust Flow Improvements for Marine Variable Pitch." This invention features a variable pitch marine propeller that can be easily replaced onto the drive shaft of a marine engine. It includes an exhaust channel through the propeller, designed to improve the flow of exhaust gas. The propeller's blade shank has a cross-sectional area that is strategically designed to optimize exhaust gas flow. Additionally, internal surfaces within the blade arm define channels that facilitate the movement of exhaust gases. Another notable patent is the "Automatic Variable Discrete Pitch Marine Propeller," which is a self-actuating propeller that adjusts its pitch based on rotational speed and hydrodynamic load. This innovative design allows for enhanced performance in various marine applications.

Career Highlights

Throughout his career, Stephen R Speer has worked with various companies, including Nautical Development, Inc. His work has focused on advancing marine technology, particularly in the area of propeller design and functionality.

Collaborations

Speer has collaborated with notable individuals in the field, including Hugh G Evans and James S Christy. These partnerships have contributed to the development of his innovative marine technologies.

Conclusion

Stephen R Speer's contributions to marine technology through his patents and collaborations highlight his role as a leading inventor in the field. His innovative designs continue to influence the efficiency and performance of marine propulsion systems.

Profile summary based on public USPTO records.

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