Early in our careers, John Caulfield and I simultaneously had similar ideas in the field of holography and optics. I’ll discuss two. The first was that, unknown to each other, he published a paper and I filed a patent on the same topic at about the same time. The other topic was one that he and I worked on together to apply for a patent on a topic that we then knew was of mutual interest.
W. Thomas Cathey,
"Simultaneous and similar ideas with John Caulfield", Proc. SPIE 8833, Tribute to H. John Caulfield, 88330D (30 September 2013); doi: 10.1117/12.2023712; https://doi.org/10.1117/12.2023712