Joey Invented a New Type of Device to Control Dog

Essay

Joey invented a new type of device to control dog barking without harming the dog.A month later,Sasha independently invented an almost identical type of device.Sasha filed for a patent immediately.When Joey became aware of Sasha's filing,Joey also filed for patent protection.Assuming that there is no statutory bar between Joey and Sasha,who should be awarded the patent prior to September 16,2003,and why? What about after September 16,2013? What law affects the result after September 16,2013? What would the result be in most other countries?