MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202521118353 A) filed by Dr. Rajesh Shankar Rajam; and Mast. Soham Rajesh Rajam, Chiplun, Maharashtra, on Nov. 27, 2025, for 'integrated foldable ruler-compass device for precise angle measurement, construction, and arc-drawing without traditional protractors.'
Inventor(s) include Dr. Rajesh Shankar Rajam; and Mast. Soham Rajesh Rajam.
The application for the patent was published on Feb. 13, under issue no. 07/2026.
According to the abstract released by the Intellectual Property India: "The invention provides an integrated ruler-compass device capable of constructing and measuring angles without the use of a traditional protractor. It combines a foldable ruler body, a pivoting compass arm, a precision pivot joint, and chord-calibrated markings that correlate arc chord lengths with corresponding angle degrees. A writing-instrument holder mounted at the end of the arm allows the user to draw arcs and define angle boundaries at any selected radius. To construct angles, the pivot is placed at the vertex, the arm is extended to the desired radius, and an arc is drawn. The ruler's chord-length scale enables users to identify the exact arc distance required to form a specific angle. To measure unknown angles, the ruler is aligned with one ray while the arm rotates to meet the second ray; the chord-calibrated scale then provides a direct angular reading. The device eliminates parallax errors and alignment problems associated with conventional protractors and reduces the need for multiple tools in geometric operations. Its foldable, lightweight design supports portability for educational, drafting, and field applications. The invention delivers improved accuracy, efficiency, and versatility in constructing and measuring angles using purely geometric principles."
Disclaimer: Curated by HT Syndication.
