Igor Sikorsky’s Early Years

In the late spring of 1889, the famous engineer and aircraft designer, Igor Sikorsky, was born in Kyiv, Ukraine (back then – part of the Russian Empire). His parents, who were both physicians seemed to have influenced the young Sikorsky’s interest in design and engineering. Even going so far as to design a basic rubber-powered helicopter capable of flight.

In 1903, Igor Sikorsky would begin his formal education at the Naval Academy in St. Petersburg with the focus of becoming a commissioned Naval Officer. However, Sikorsky would leave the Naval Academy in 1906 to focus on engineering. He would briefly study engineering in Paris but would return to Kyiv to attend Kyiv Polytechnic University (which now bears his name). After attending for only one academic year, Sikorsky would leave Kyiv Polytechnic to pursue engineering on his own. His reasoning being that the disciplines of the higher sciences and abstract mathematics had limited relation to the subjects of practical problems.

Igor Sikorsky’s First Pursuits in the Field of Aeronautical Engineering

After leaving Kyiv Polytechnic University, Sikorsky would travel across Europe where, in 1908, he would hear of the Wright Brothers’ first successful flight. Sikorsky would again return to Kyiv and begin the pursuits in the virgin field of Aeronautical Engineering. He did two unsuccessful tests his own design of a rotary-wing aircraft (helicopter) in 1909 and 1910. This would shift his focus towards fixed-wing aircraft designs (airplanes), and he would not return to his designs for rotary aircraft for the next 30 years.

Igor Sikorsky’s First Successes Designing Fixed Winged Aircraft

In the time Igor Sikorsky focused on fixed winged aircraft, he would create multiple notable designs that would go on to see service in both the military and civilian sectors. One of his first prominent designs was the S-10 Hydroplane which was successfully tested in 1913. His design was soon adopted by the Navy as both a sea and land-based aircraft design, just in time for the First World War. Sikorsky would move to the United States in 1919.

In 1923, Igor Sikorsky along with colleges, some of which were former emigrant Army Officers, founded the Sikorsky Aero Engineering Corporation with it’s headquarters near Roosevelt Field on Long Island.

By 1928, Sikorsky would be an American citizen and by 1929, Sikorsky Aero Engineering would be a part of the United Aircraft Company.

In 1931, the Sikorsky Model S-40 would be successfully tested and help to pioneer the Pan American World Airways flights across the Caribbean and South America. By 1937, following design improvements and engineering innovations, Pan America would begin Trans-Pacific flights using the 4-engined Sikorsky S-42 “Clipper”.

Igor Sikorsky Pioneering the Innovations in Rotary-Winged Flight

Following the success of his fixed-wing designs, Igor Sikorsky would again turn to his rotary-wing aircraft having determined technology and manufacturing had finally reached a point in which the demands for rotary-wing flight were met.

Armed with the highly essential improvements in aerodynamics, in 1939 Sikorsky would begin designing the SV-300 rotary aircraft. On the 14th of September of that same year, with Igor Sikorsky himself behind the controls, the SV-300 would achieve flight becoming the first rotary-winged aircraft to achieve flight. By May, 1941 following design improvements and building on the successes of the original flight tests, the SV-300 would again take to the skies and achieve a world endurance record in rotary-winged flight by staying airborne for 1 hour and 32.4 seconds, with Sikorsky himself again behind the controls.

Igor Sikorsky’s Intellectual Property

Igor Sikorsky paid particular attention to securing his intellectual property as safeguard of his innovations and further pursuit.

Patents

He secured numerous patents for his innovations, particularly those related to his pioneering work on helicopters.

Here are some Sikorsky patents filed and registered in the United States:

U S 1,807,939: Aircraft Including Seat For Same, granted on June 2, 1931. This patent describes an aircraft, specifically focusing on the arrangement of a pilot's compartment and seat within an amphibian aircraft. The patent details an adjustable seat designed for aircraft pilots, which is slidably mounted within a frame and includes means for sliding and locking it in various positions. This adjustable seat is intended to allow the pilot to effectively observe the disposition of the landing wheels when operating on the ground or approaching the water.

 

 

U S 1,838,044: Aircraft Especially Aircraft of the Amphibian Type Including Means of Constructing and Operating the Same, granted on Dec. 22, 1931. This patent relates to improvements in the construction and operation of this type of aircraft. The invention covers propulsion means and methods, particularly highlighting the use of reaction jets positioned near the trailing edge of sustaining airfoils. The patent also discusses features such as retractable landing wheels housed within streamlined casings or sponsons attached to the aircraft's body.

 

U S 1,879,715: Amphibian Boat Structure, granted on Sept. 27, 1932. This patent focuses on the structure of an amphibian boat intended for use in aircraft. It outlines various structural details designed to facilitate the entering and leaving of passengers, including the arrangement of a passenger compartment, a toilet compartment, and overhead and side hatches. The patent also incorporates provisions for retractable landing gear mounted on the body structure.

 

US 1,879,716: Amphibian Aircraft, granted on Sept. 27, 1932. This patent describes the construction of the center section structure of an amphibian aircraft. The invention details the arrangement of fuel and oil tanks within this center section and describes the engine supporting frames and means for suspending the engines below the plane of the aircraft. It also includes the design for the retractable landing gear mechanism.

 

U S 2,318,259: Direct-Lift Aircraft, granted on May 4, 1943. This patent focuses on helicopters, describing the arrangement of a main lifting rotor and one or more auxiliary rotors. A significant aspect is the provision of means for automatically controlling the pitch of the main rotor or adjusting engine power to maintain a constant rotor speed when the pitch is altered. It also covers control mechanisms for varying the pitch and engine power of the rotors.

 

U S 2,318,260: Helicopter And Controls Therefore, granted on May 4, 1943. This patent describes improvements in helicopters and their control systems. It details the arrangement of the main rotor, auxiliary rotors, and control linkage for changing the pitch of these rotors. The invention provides control means for varying the pitch and engine power of the rotors.

 

U S 2,402,349: Adjustable Rotor, granted on June 18, 1946. This patent describes an adjustable rotor for helicopters. A primary object is to provide structure, independent of cyclical pitch control, for compensating for changes in the location of the center of gravity. A key feature is a rotor head designed to tilt in a fore-and-aft direction about a horizontal axis, allowing the rotor cone axis to be tilted without using cyclical pitch control for this purpose.

 

U S 2,415,148: Blade Flapping Angle Control, granted on Feb. 4, 1947. This patent relates to improvements in direct-lift aircraft (helicopters), describing a mechanism for automatically reducing the pitch of rotor blades when their coning angles exceed a predetermined value. The patent details the apparatus for controlling the pitch changing of rotor blades in response to their coning angles, with the aim of preventing dangerous increases in coning.

 

Trademarks

Trademarks, are primarily associated with the Sikorsky Aircraft Corporation, the company he founded in 1923. This company, now a subsidiary of Lockheed Martin, holds trademarks for:

SIKORSKY: This is the primary wordmark for the company and its products, registered for various goods and services related to aircraft, helicopters, and related accessories and services (e.g., hand tools, printed matter, clothing, games, repair and maintenance).

Specific helicopter models and technologies: Sikorsky Aircraft Corporation also holds trademarks for many of its famous models and technologies, such as:

  • S-97

  • RAIDER

  • S-97 RAIDER

  • CYCLONE

  • SB>1 DEFIANT

  • X2 TECHNOLOGY

  • LEAF TECHNOLOGIES

  • HAWK WORKS

  • SUPERHAWK

  • BIM (Inspection apparatus for detecting flaws and cracks in aircraft blades)

  • SIKORSKY360 (aircraft repair and maintenance)

  • EXCALIBUR CARD (air transportation services)

  • And others like MH148 and COMANCHE (though some of these might be under Lockheed Martin's broader portfolio now, as Sikorsky is a subsidiary).

In essence, while Igor Sikorsky's name is intrinsically linked to these trademarks through the company he established, the registration and ownership of the trademarks for "Sikorsky" and its associated products and services are held by the Sikorsky Aircraft Corporation, and subsequently by its parent company, Lockheed Martin.

 

Partner with DESTRA: Protecting Innovation in Ukraine

At DESTRA, we deeply value the historical pursuit of innovation and recognize the pivotal role intellectual property plays in safeguarding the work of creative minds. We believe that by protecting these contributions, we actively encourage inventors to enrich the world's progress.

If you are a patent attorney seeking reliable and expert representation for your clients' intellectual property in Ukraine, or an inventor looking to secure robust protection for your groundbreaking creations, we invite you to connect with us. DESTRA offers comprehensive services in Ukrainian patent law, ensuring your innovations receive the diligent and strategic protection they deserve.

Beyond patents, we also specialize in securing vital protection for your brand identity and aesthetic creations. Whether you're looking to register trademarks to safeguard your brand names, logos, and slogans, or to protect industrial designs that define the unique appearance of your products, our experienced team in Kyiv and Lviv is ready to assist. We ensure your distinctive intellectual assets are firmly secured under Ukrainian law, allowing your business to thrive with confidence.

- Author: Christopher Watts for DESTRA Patent Law Firm

#PatentAttorneyUkraine #UkrainianPatentAttorney #TrademarkAttorneyUkraine #UkrainianTrademarkAttorney #IntellectualPropertyUkraine