Home
Vintage Patents
All available patents
Inventor biographies
Patent calendar
Patents by assignee
Patents by category
Patents by inventor
Patents by language
Patents by location
Research links
The B26B21 patents
US Patents by Serial No
Patents by CSS style
Patents missing
Patents pending
SE Patent calendar
Waits Patent List
Vintage Razors
American Safety Razor Co.
Appleby Archive
Kampfe Star Razors
Schick for Dummies
The Term “Safety-Razor”
Waits Errata
Articles
3D Printed Designs
Brush Drying
Cheap Valet Strop Replacement
Enders Speed Razor with…
…modern blades
How pass arounds work
Make your own wedge blade
New handles for old razors
SE blade shimming
Taking 360° Images
Support This Site
Amazon wish list
AliExpress wish list
PayPal
Community
Against The Grain
Forum der Rasur
The Original Safety 3
The Shave Den
The Shaving Room
Social Media
Mastodon
Mastodon
Gillette Tech 1972
Date code S4 - 4
th
quarter 1972
