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Acoustic levitation

ultrasonic levitator
click to enlarge

What you can see at right is something that I find astonishing in several ways.  One astonishing thing is that three small styrofoam balls are suspended in space, defying gravity.  These three balls have been suspended in space, defying gravity, for over 48 hours, and they might continue this way for many days, unless a breeze or puff of air were to disturb them.

A second astonishing thing is that this device cost only $4.79.

In this blog article I describe how it is that for a mere $4.79, I found myself able to defy gravity, suspending three small styrofoam balls in space.

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First successful DMR activity

digital mobile radio
click to enlarge

(Update:  my second-ever successful DMR activity was participation in the July 18, 2026 World Wide Check-In.)

It turns out that there is a thing called DMR or digital mobile radio (Wikipedia article). This is a thing that some radio amateurs do. To do DMR, you use a “hot spot” such as the one shown at right.  It uses an antenna to transmit and receive on the 70-centimeter radio band, and it connects to the Internet via wifi.

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Attend a two-presenter, 2½-day live in-person Patent Cooperation Treaty seminar in beautiful Colorado

Long-time PCT enthusiasts will appreciate that in recent years, there have been few opportunities in the US to get high quality PCT training with more than one experienced presenter on the dais.

Such PCT enthusiasts will likewise appreciate that in recent years, there have been few opportunities in the US to get high quality PCT training of such depth and breadth as to call for more than one day of training.

Now for the first time since before Covid, attend a multi-day live in-person Patent Cooperation Treaty seminar in the US taught by two experienced presenters.  This training will take place in beautiful Colorado, near the Denver airport.

Maybe also attend an optional half-day program specifically directed to docketing of the PCT!

Loyal readers of this blog are encouraged to subscribe, if they have not already done so.  Loyal readers of this blog are also encouraged to use coupon codes (which expire July 28) for discounts on the registration fees:

    • coupon code BL1 – 2.5-day seminar $200 off
    • coupon code BL2 – docketing $60 off
    • coupon code BL3 – both courses, $260 off

For more information, or to register, click here.