If you would like to apply to take the patent bar examination, you must demonstrate to the satisfaction of the United States Patent and Trademark Office that you possess the scientific and technical training necessary to provide valuable service to patent applicants.
Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month, your body prepares for pregnancy. If no pregnancy occurs, the uterus, or womb, sheds its lining. The menstrual blood is partly blood and partly tissue from inside the uterus.
From 18-45 days is considered the normal range with most women between 25 and 32 days and 28 days being the average. That is from the first day of your last cycle. Basically there is no real normal what ever is normal for you is normal.