1. Sebban, E.: Infrared Noncontact Thermometer. U.S. Patent 549,114, issued Aug 21, 2007
2. Yelderman, M., et al.: Noncontact Infrared Tympanic Thermometer. U.S. Patent 5,159,936, issued Nov 3, 1992
3. Wenbin, C., Chiachung, C.: Evaluation of performance and uncertainty of infrared tympanic thermometers. Sens. (Basel, Switzerland) 10(4), 3073–3089 (2010)
4. Cascetta, F.: An evaluation of the performance of an infrared tympanic thermometer. Meas. 16(4), 239–246 (1995)
5. Jang, C., Chou, L.: Infrared Thermometers Measured on Forehead Artery Area. U.S. Patent US 2003/0067958A1, issued Apr 10, 2003