July 7, 1936: Get a Grip — Phillips Screws Up the Toolbox | WIRED
The History of Phillips Screws
The Important Role Of Phillips Head Screws In Constructions | Melfast
Bytes: Origins: Phillips Head screw
The History of the Phillips Screwdriver - Chris Duke
The Portland businessman behind the Phillips screw
Bit History: The Phillips | iFixit News
Bit History: The Phillips | iFixit News
Why are Phillips Screws EVERYWHERE? - The Phillips Drive | Fastener History
How the Phillips Screwdriver Took Over America
:max_bytes(150000):strip_icc()/101698197x-54cb682e8b6e42e3a950f130340a8e3c.jpg "What are Robertson screws?")
What are Robertson screws?
How the Phillips Screwdriver Took Over America
NIHF Inductee Henry Phillips Invented the Phillips Screw
NIHF Inductee Henry Phillips Invented the Phillips Screw
History of Screwdrivers, from the Beginning till Now | Ronix Mag
That Phillips-head screw isn't what you think it is - Hagerty Media
History of the Robertson Screwdriver
Phillips screw and driver
Henry F. Phillips - Wikipedia
History of Screwdrivers, from the Beginning till Now | Ronix Mag
Furniture Specific: Old screws / useful clues
A Tale of Twists - Inventors Digest
Robertson Screw | Stu's Shed
:max_bytes(150000):strip_icc()/close-up-of-screwdriver-and-nut-on-table-674253453-5abd4c7518ba010036861889.jpg "The History of Early and Modern Screws and Screwdrivers")
The History of Early and Modern Screws and Screwdrivers
The History of the Phillips Screwdriver - Chris Duke
A Brief History and Evolution of the Screwdriver – Haus of Tools
P. L. Robertson - Wikipedia
A Better Way to Screw. | A Continuous Lean.
