What is the difference between one-way and two-way distinctness in patent restriction requirements?

In patent restriction requirements, the concepts of one-way and two-way distinctness are important for determining whether inventions are distinct: One-way distinctness: Generally sufficient for inventions in different statutory categories (e.g., a product and a process of making it). Two-way distinctness: Required for inventions in the same statutory category (e.g., two related products or two related…

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