A utility patent is the most common type of patent issued by the USPTO. It refers to an invention that can be categorized as a process, composition of materials, machine or an improvement on any of these categories. A utility patent gives the inventor exclusive rights to make or sell the invention for 20 years.
They construct nests of bulrush and lay one to three eggs, (usually two) in late April and early May. The incubation period is about 29 to 31 days. Whooping cranes will renest if the first clutch is lost or destroyed before mid-incubation.Both sexes share incubation and brood-rearing duties. Despite the fact that most pairs lay two eggs, seldom does more than one chick reach fledging.he life span is estimated to be 22 to 24 years in the wild. Whooping cranes are omnivorous feeders. They feed on insects, frogs, rodents, small birds, minnows, and berries in the summer. In the winter, they focus on predominantly animal foods, especially blue crabs and clams.
The length of a gestation period varies from bird to bird. Oftentimes, larger birds require longer gestation periods than smaller birds.For example, muscovy ducks -- one of North America's largest ducks -- require approximately 35 days for gestation, while smaller ducks have gestation periods of less than 30 days.Smaller perching birds, such as northern mockingbirds, have a gestation period of only 13 to 15 days.A smaller bird of prey, the red-tailed hawk, has a gestation period of 28 to 32 days, while the California condor needs at least 56 days for the gestating period.he length of a gestation period varies from bird to bird. Oftentimes, larger birds require longer gestation periods than smaller birds.