Final answer:
True, Jabir, along with other historical figures like Ibn al-Haytham and Robert Koch, made significant scientific contributions that remain important today, such as the advancement of optics, the modern scientific method, and techniques in medical diagnosis.
Step-by-step explanation:
The statement that Jabir discovered and invented many useful techniques and equipment that are still essential findings today is true. Throughout history, many scientists like Ibn al-Haytham, Robert Koch, and Taqi al-Din have made significant contributions to their fields, with lasting impacts on the scientific world. Ibn al-Haytham is notable for his advancements in optics and his methodological approach that paved the way for the modern scientific method.
Taqi al-Din's astronomical work spans across religious and national borders, influencing other scientists of his era. Robert Koch's development of techniques for pure culture and his assistant's invention of the Petri dish revolutionized diagnostic tools in medicine. These historical figures represent the cumulative effort and evolution of scientific discovery and invention.