INVENTION OF NALLA MALLA REDDY – PATENT No. 318141 “LEARNING DEVICE FOR BEGINNERS FOR THOROUGH PRACTICE OF LETTERS OF ALPHABETS BY WRITING IN GROOVES” Posted on December 24, 2019May 14, 2022 by nmraksharabhyas “LEARNING DEVICE FOR BEGINNERS FOR THOROUGH PRACTICE OF LETTERS OF ALPHABETS BY WRITING IN GROOVES”