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.
Various examples. 1  An average whooping crane egg is 102 mm (4.0 in) long and weighs 208 g (7.3 oz) 2  Eurasian oystercatcher eggs camouflaged in the nest. 3  Egg of a senegal parrot, a bird that nests in tree holes, on a 1 cm (0.39 in) grid. 4  Eggs of ostrich, emu, kiwi and chicken. 5  Finch egg next to American dime.