IP Library › Granted Patent US 4,687,902
Granted Patent Utility
US 4,687,902 · App. 06/763,024

Electron-beam welding apparatus

Inventors: Russell K. Colegrove, Glen S. Lawrence
Patented Case View Patent ↗
Granted: Aug 18, 1987 Filed: Aug 6, 1985
Inventors
Russell K. Colegrove
Glen S. Lawrence
Assignee (at issue)
Leybold-Heraeus GmbH

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,687,902
App. No.
06/763,024
Filed
1985-08-06
Granted
1987-08-18
Kind
A