Dr. Baromio is the first to transplant hairy areas in animals.
Professor Dr. Dom Unger performs the first auto-transplantation of hair and his student surgeon Johann Friedrich Dieffenbach published his doctoral thesis in which they describe auto-transplantation of animal hair.
Dr. Shoji Okuda uses a circular scalpel for grafts to transplant skin with hair follicles for restoration of injury scars and alopecia.
Dr. Tamura transplanted micro-implants of 1 - 3 hairs to restore female pubic hair making an elliptical incision. Tamura harvested donor micrografts and prepared recipient sites using a thick needle.
Dr. Norman Orentreich performed the first hair transplant to treat male pattern hair loss, which became the foundation of modern hair transplantation techniques.
Dr. Carlos Oscar Uebel performs the excision of a linear donor strip which popularized the use of large numbers of small grafts.
The DHI hair transplant technique has been developed by the specialists of the Kyungpook National University in Korea to minimize the transport duration of the grafts.
Dr. Ray Woods in Australia uses circular punches of 1 mm to harvest single follicular units.
Dr. Robert M. Bernstein and Dr. William R. Rassman describes FUE as a surgical technique in medical literature.
Dr. Jim Harris invented a method for the extraction of follicular units using Motorized Punches which were later on adopted by Dr. Robert Bernstein , Dr. William Rassman, Dr. John Cole, Dr. Jean Devroye, Dr. Sanusi Umar and Dr. Roberto Trivellini.
Robopen has been produced in 2021. It is the world's first handheld and automated hair transplant incision device and it is patented.